Internet Essay Example | Topics and Well Written Essays - 500 words - 2

Internet - Essay Example , the internet has become as effective as the face-to-face interactions, in providing political knowledge to people, and spurring them to political actions. The internet has influenced the political interactions of different regions of the world. This includes America, the Middle East, Africa, and the other entire world parts. In America, the transformation of politics by the internet was influenced by the 2006 white house and congressional selections. Internet continues to play a political role in the advertising different party candidates, helping in party fund-raising, and the spread of both positive and negative information. In the USA, both Democrats and Republicans have used the internet in their political campaigns. These have made use of their party blogs, candidate blogs, use of e-mail, and the interactive websites to aid their campaign process. This has been efficient in assembling crowds for rallies, raising money for the parties, and increasing the party preference for people. What has accelerated the use of the internet is because it is less costly and yet it is highly efficient, compared to the traditional methods, which a re slow and involving. Howard Dean is known for his use of social media during his campaign for the Democratic Presidential ticket, through MeetUp.com, where he managed to get 190,000 online supporters. Through the internet, Dean was able to raise millions of dollars in a matter of a few weeks. Apart from Dean, McCain also utilized the internet in his campaigns in the year 2000. He raised $6.8 million, and had 40,000 online supporters. This shows that the internet is influential in political interactions today (â€Å"Journalist’s Resource† Web). In the Middle East, there are concerns that the internet highly contributed to the political upheaval in the form of the Arab Spring, which started in 2011. The internet is mainly blamed for influencing negatively the politics in the area, as it has contributed to the sustenance, if not

Recent developments in the UK housing market Essay

Recent developments in the UK housing market - Essay Example In general house prices must behave in a similar manner as that of inflation rates prevailing in an economy. However, if we consider the recent boom in housing prices in the UK since the year 1998, it can be observed that the housing prices behaved in an opposite direction to that of the general inflation rate of the UK’s economy. It implies that there has been a significant rise in the overall house prices of UK since 1998 but the general inflation was on the lower side and did not rise that significantly as compared to the house prices. Next, if we look at the relation between the house prices and income of the households in the UK it can be observed that the house prices increased at a greater rate than the income of the households during the period of the recent housing boom. If we look at the current affordability of the houses in the UK it can conclude that the house properties are less affordable because of the high house price to income ratio at present. It implies that the UK households do not have enough income to be able to buy houses which are of high prices. Moreover, the house prices are directly linked to the changes in income levels of households because most of the houses are bought through mortgage services offered by financial institutions. Hence it is very unlikely to get loans to buy houses with lower income levels. This is how the house properties became less affordable for people who were having a comparatively lesser rise in income levels as compared to the rise in house prices in the UK. ... implies that there has been a significant rise in the overall house prices of UK since 1998 but the general inflation was on the lower side and did not rise that significantly as compared to the house prices. It means that although the house prices rose significantly the prices of other goods and services did not rise that much. Next if we look at the relation between the house prices and income of the households in UK it can be observed that the house prices increased at a greater rate than the income of the households during the period of recent housing boom. If we look at the current affordability of the houses in UK it can concluded that the house properties are less affordable because of the high house price to income ratio at present. It implies that the UK households do not have enough income to be able to buy houses which are of high prices. Moreover the house prices are directly linked with the changes in income levels of households because most of the houses are bought thro ugh mortgage services offered by financial institutions. Hence it is very unlikely to get loans to buy houses with lower income levels. This is how the house properties became less affordable for people who were having comparatively lesser rise in income levels as compared to the rise in house prices in UK. Answer 3 There has been a significant rise in the demand of houses in UK during the period of 1998 to 2007. There are various factors which led to this increase in housing demand like increase in disposable income, lower interest rates, and increased availability of mortgage finance. The wages have increased at a faster rate than inflation from 1998 to 2007. Now since the households have the tendency to spend a certain proportion of their income levels on housing, the demand for housing

The Law of Comparative Advantage Essay Example | Topics and Well Written Essays - 2000 words

The Law of Comparative Advantage - Essay Example Because the theory failed to understand the laws of absolute and comparative advantage, which advocates that trade, may not necessarily be a zero-sum game, mercantilists regulations were gradually removed in Britain in the course of eighteenth century after the government has fully embraced Adam Smith's concept of laissez faire (Wikimedia Foundations, Inc). The greatest challenge to mercantilism was Adam Smith's theory of absolute advantage. It is said that Smith's publication of the book The Wealth of Nation in 1776 has ended the rule of mercantilism as an economic philosophy. In contrast to the necessity of government control in the mercantilists' philosophy, Adam Smith advocated the laissez faire system, with limited government intervention in the economy. Particularly, Smith believe that trade would be beneficial to both countries through specialization. In practical terms, when one country is more efficient than another country in the production of one commodity but is less efficient in the production of another, then both can gain by specializing in the commodity in which it has the absolute advantage. ... As trade is deemed beneficial to all, restrictions are discouraged and limited government intervention is advised. An Unchallenged Theory An enhancement and definitely a higher notch than the theory of absolute advantage is the law that says that one country can benefit from trade even if it is less efficient in the production of both commodities. It is the law of comparative advantage: an impetus for small nations to actively participate in trade as it is believed to benefit both the big and the small countries. Introduced by David Ricardo in 1817 through his book On the Principles of Political Economy and Taxation, comparative advantage posits that trade can create value for both countries even if one has the fewer resources in the production of all goods. Using the production possibilities frontier, Ricardo was able to prove this, achieving a significant breakthrough in the field of international economics. Practically, Ricardo believes that given the situation, both countries can still gain by having the less efficient country specialize in the production and exportation of the commodity in which its absolute disadvantage is smallest and import the product in which it has its greatest absolute disadvantage. The commodity in which one country has the least absolute disadvantage can be thought of as one in which it has the comparative advantage. The gains are realized as both countries specialize in the production of commodity in which it has the least opportunity cost (Mankiw). The Gains from Trade: A Simple Numerical Example To facilitate understanding of the gains from trade, we cite the example from the Principles of Macroeconomics book of N. Gregory Mankiw. Given that it takes 20 hours for farmer to produce 1 lb of meat and 10 hours to produce 1

Housing Industry Essay Example | Topics and Well Written Essays - 1000 words

Housing Industry - Essay Example The increase in the number of household is as a result of population growth and migration and this in turn results inot an increase in the demand for houses. In 2006 the total number of houses in England was 21,989 thousand according to table 3.1, an analysis of the various regions it was evident that majority of these dwellings which is 16% were located in south east while only 5% of these dwellings were located in the north east region. (Calculations in appendixes 1) The following chart demonstrates the total number of dwellings in thousands for each region in 2006. It is evident from the chart that majority of dwellings are located in the south east and London which is 16% and 15% respectively of total dwellings in England. The following is an analysis of the total number of dwellings in the regions for the year 1996 and the year 2006(calculations in appendixes 2). From the above chart it is evident that each region has experienced an increase in the number of dwellings, however some regions have higher increase than other regions especially the South east region has the highest increase in the number of houses while the north east region has the lowest increase in the numbe... The north east region and the south east region: Percentages of the total for each year: From the above chart it is evident that there has been a decline in the percentage of the total for the South east region whereas there has been a relatively low decline in the percentage of the total for the North East region, however from the trend it is evident that the South east region has maintained a relatively high percentage of the total over the years compared to the North East region. Calculations in appendix 3. Trend in the number of houses in the N. east region and the S. east region: The following chart summarizes the trend in the number of houses in the N. east region: From the above chart it is evident that there has been an increase in the number of houses in the N. east region over the years. From the above chart it is evident that there has been a gradual increase in the number of houses in the S. east region over the years. Moving averages: We now analyze the moving average for the two regions over the years. The following table summarizes the simple centered 3 step moving average for the N. east region from the year 1997 to 2005: (calculations in appendix 4) N. East N. East moving average 1996 1,094 1997 1,100 1099.333 1998 1,104 1104 1999 1,108 1108 2000 1,112 1111.667 2001 1,115 1115 2002 1,118 1118.333 2003 1,122 1122 2004 1,126 1126.333 2005 1,131 1131.333 2006 1,137 The data is summarized by the following chart: The above line chart shows the 3 period centered moving average and the total number of houses in the N. East region. The following table summarizes the simple centered 3 step moving average for the S. east region from the year

Strictly Ballroom Essay Example for Free

Strictly Ballroom Essay The concept of belonging is explored well in the film Strictly Ballroom. Directed by Baz Luhrmann and released in 1992, this film explores the concept of belonging in relation to places, events and relationships. Throughout the film, techniques such as symbolism, lighting, costume, non-diagetic music and dialogue help to express these concepts to the audience. Firstly, Symbolism is the most common technique used throughout the film to convey belonging to the ballroom dancing world. In Scene 1 of â€Å"Strictly Ballroom†, symbolism is used to connect the protagonist, Scott to the world of ballroom dancing. The number 100 pinned to his back represents his strive for perfection and his determination to win. The gold sequinned costume also reinforces this idea, also being symbolic of the golden performance expected of him. Through symbolism, we can see that scott is trying to belong to the ballroom dancing world by conforming to their standards and expectations. Secondly, belonging to different places is delineated through the film technique of lighting. In Scene 3 when Scott is dancing by himself in front of the mirrors, natural lighting is used which conveys a sense of freedom and enjoyment felt by him as he dances his own steps. Scott feels a new found sense of belonging where he can be himself. This is contrasted to the bright, artificial lighting used in the competition where everyone must conform to standards of the Dance Federation. In the competition, Scott does not smile and he is conforming to the standards of the dance federation which do not allow new steps in the competition. Another aspect of belonging explored in the film is belonging and relationships, especially for Fran and Scott. This is expressed through the choice of costume for both protagonists. At the beginning of the film (scene 1) Fran wears oversized t-shirt and tights and oversized glasses. When we are introduced to Scott, he is wearing costumes for the dance competition but when we see him by himself or dancing with Fran, he wears simple white singlet and black pants. Also for Fran, as the film progresses, her clothes are replaced with more figure hugging leotards and leggings with skirts. By Scene 4, we see both protagonists have matching costumes (simple black and white attire) which symbolises their growing connection as a couple. The removal of her glasses in this scene completes her transformation from the ugly duckling. This technique conveys the belonging of the protagonists to each other as opposed to belonging to the dance federation and also represents their blooming relationship. Non-diegetic music is also used effectively to show their relationship. Also in Scene 4, Scott and Fran are dancing to the song Time After Time. Some of the lyrics read â€Å"If you fall I will catch you† which symbolises Scott’s increasing acceptance of Fran and vice versa and also the development of their relationship not just professionally but also suggesting it romantically. They are beginning to belong to each other. In Scene 7, Non-diegetic music is used once again and again they are dancing to the song. It’s lyrics â€Å"You won’t admit you love me..a million times ive asked you and then I ask you over and over again your only answer pehaps, perhaps, perhaps†¦if you cant make your mind up well never get started and I don’t want to wind up being parted broken hearted† are symbolic of the decision Scott needs to make both professionally and romantically in regards to his relationship with Fran. Their relationship is also emphasised through the close-up shot of them dancing and their intense eye contact. These techniques combine to delineate to us the growing sense of belonging Scott and Fran have with their relationship to each other. Lastly, towards the end of the film, a long shot has been used to show us that the protagonists, mainly Scott, have found their sense of belonging. The long shot has been used at the Pan Pacifics to view all the dance couples on the dancefloor. The long shot juxtaposes Scott and Fran’s strong, passionate dancing against the flamboyant, inexpressive dancing of all the other couples helping to reinforce how much they don’t belong to this world. Costume, once again has been used to emphasise this point as Fran is wearing a beautiful, red, simple but sophisticated flamingo dress and Scott is wearing a vibrant gold matador jacket. These vibrant colours are symbolic of their passion for dancing and each other as well as their authenticity in their dance. Their costumes look beautiful and authentic in contrast to all the other couples who are wearing frilly, brightly coloured costumes which ridiculous in comparison. Scott has finally a true sense of belonging for himself which is being true to oneself. Dialogue is used to show that in order to belong, you must conform to the standards of the Dance Federation and the authority, Barry Fife (the antagonist). In Scene 1 after Scott danced his own steps, his dance partner at the time, Liz, says to him â€Å"Im not dancing with you until you dance they way you’re supposed to.† Liz’s dialogue puts pressure on Scott to conform rejecting his desire for individuality. Les says â€Å"he resorted to his own flashy, crowd pleasing steps† showing disapproval for what happened feeling that the dance should be to please the judges and Barry Fife. When Scott asks his friend Wayne how he felt about his dance, he replies â€Å"I don’t know, you didn’t win did you?† showing that winning is everything in the dance world. Dialogue has been used to make us viewers aware that in the Ballroom Dancing world, the concept of belonging means conforming to the rules and standards set up by them. In conclusion, we can understand there are different ways to belong. Belonging to a place or an event may require you to conform to their rules and standards which can stifle individuality- this can have negative effects on people. Relationship and belonging may help you find yourself. Also finding belonging by being true to oneself is so most important.

John Kotter Good Leadership Management Essay

John Kotter Good Leadership Management Essay Lead only if u can manage. Though leadership means superiority and power, but management is the basic necessity and pillar of a business organisation. For a leader to function efficiently managerial skills and abilities are essential. The words lead from leadership and manage from management itself specifies its functions and characteristic activities. Leadership and management are definitely two distinctive and complementary systems of action as told by John Kotter in 1991. Both leadership and management are not natural, they are acquired abilities and talents that can developed and modified according to the situation. Both leaders and managers are significant in an organisation to lead the management towards its vision and to manage the employees to accomplish the mission of the organisation. To briefly elaborate the topic assigned, this report will proceed along the following spectrum: what is management? , management concepts, who is a manager?, managers attributes and qualities, role of a manager, management theories, what is leadership?, who is a leader?, what attributes/traits makes a leader successful?, theories of leadership and difference between leadership and management. All of these topics will be explained briefly below with suitable quotes and examples. WHAT IS MANAGEMENT AND ITS CONCEPTS? Management is an existing process which is mainly result oriented, this process involves proper utilization of resources such as human, financial and material resources which are available to the organizations and to individual managers for the purpose of goal attainment (Michael Armstrong, 1990, p. 1). There are four basic management concepts namely, Planning- What, How and When the tasks must be performed. Organizing- Determining tasks, Groupings of work and Putting plans into actions Influencing- Motivating, Leading, Directing organization members mainly to increase productivity. Controlling- Gathering information, Making comparisons and Finding new ways of improving production through organizational modifications (Samuel and Trevis, 2012, p.27). WHO IS A MANAGER? A Manager is a person in an organization, who has a group of employees under his control and it is his responsibility to plan, organise, influence, monitor and control the work of his group or team in order to achieve the organizational goals. There are different types of managers based on their field of work. Such as financial, production, service, marketing, human resource managers. Different managers have different responsibilities and targets. According to F. John Reh,(2011) a senior business executive says a manager is a person who helps others and get more done by motivating them, providing directions, making sure they are working together toward a common goal, removing roadblocks and providing feedback. Peter F. Drucker,(2009) a successful American businessman says The productivity of work is not the responsibility of the worker but of the manager. MANAGERS ATTRIBUTES AND QUALITIES Conceptual ability- A manager is in need of this ability which also involves decision making skills during some complex situations including environmental situations. A managers conceptual ability should be used in relation to the objectives and strategic planning of the organisation. (Laurie J. Mullins, 2005, p.212). Social and human skills- It refers to interpersonal relationship between the manager and employees. The manager should effectively utilise the human resource of the organisation which involves team works and proper direction to his employees and more over the manager should also be versatile. (Laurie J. Mullins, 2005, p.212). Technical competence- It is the managers ability of utilization of specific knowledge, methods and techniques to organise the tasks and is mostly required at supervisory level, staff trainings and in day-to-day operations. (Laurie J. Mullins, 2005, p.211). ROLE OF A MANAGER See Possibilities Manager is the only people who knows the employees better than anyone else and try to bring the best out of them. (Scrid, 2012) Know the Structure   Manger should be up-to-date with the organisation structure and objectives, so that he can evaluate his expectation from the employees. (Scrid, 2012) Remember: Small Actions Count!   Little drops of water make the ocean, and little kindness act as bond between the manager and the employees and creates respect among each other. (Scrid, 2012) Be Creative In this complex and volatile business environment it is expected for the manager to be creative and be an inspirational tool for co-workers and other employees. (Scrid, 2012) Commit   As the level of commitment is contagious, a manager should not only be committed to his objectives but should also show commitment toward his employees. (Scrid, 2012) Be Human   Authority should not create a gap between a manager and his employees. The manager can be himself, but if he tries to be someone his employees can look up to. The manger will gain respect, loyality and a good connection. (Scrid, 2012) Stay Versatile   A manager should be flexible and versatile and be ready for sudden changes and others suggestions from his employees. (Scrid, 2012) Have fun while you work   A manager should know how to be professional at work and having fun in the process. (Scrid, 2012) Be a role model   The manager is considered as the leader for the employees working under him. The employees will mirror their managers work ethics. So the manager should be worthy of being a role model. (Scrid, 2012) MANAGEMENT THEORIES: Frederick Taylors Scientific Management Lillian Gilbreths motion study Max Webers bureaucratic theory Henri Fayols administrative theory Elton Mayos hawthorne effect Systems Approach Chaos theory Team Building theory WHAT IS LEADERSHIP? Ralph Stogdill (1950) points out that the definition of leadership has three components, they are: 1. Interpersonal relationship, 2. Social context and 3. Goal attainment. So leadership is the process of influencing one subordinate or an organised group in setting a goal and in attaining the targeted goal. (Buc and Huk, 2010, p.596) Peter F. Drucker,(2009) a successful American businessman says Effective leadership is not about making speeches or being liked; leadership is defined by results not attributes. WHO IS A LEADER? A leader is one who keeps people moving forward by motivating them and invest in them rather than getting something out of them.A leader is one who delegates the work to the right person who can do it better than the others.A leader not only identifies problems but also initiates a solution to the problem. According to Douglas MacArthur, (1930)   the son of the high-ranking military figure, Arthur MacArthur says A true leader has the confidence to stand alone, the courage to make tough decisions, and the compassion to listen to the needs of others. He does not set out to be a leader, but becomes one by the equality of his actions and the integrity of his intent. WHAT ATTRIBUTES/TRAITS MAKES A LEADER SUCCESSFUL? Emotional intelligence- It is the ability to identify, evaluate, and control the  emotions  of oneself, of others, and of groups. Daniel Goleman framed emotional intelligence and he identified six leadership styles which affect working atmosphere and financial performance. The aspect of emotional intelligence is the selection of these leadership styles to be successful. (Buc and Huk, 2010, p.614) Interpersonal communication skill- It is the   is the process by which people exchange information, feelings, and meaning through  verbal  and  non-verbal  messages: it is  face-to-face communication. Interpersonal communication is not just about what is actually said, it is also about the language used and but  how  it is said and the non-verbal messages sent through tone of voice,  facial  expressions, gestures and body language.(Skillsyouneed, 2012) Modification skills- a leader must be versatile and flexible in order to handle the situations and make some modification in his behaviour, objectives and plans in order to initiate a solution for the problems being faced by the organisation. Creativity- as the decision making process lies in the hands of the leader. It is expected from him to be creative and come up with some innovative decisions for the welfare and profitability of the organisation. Creativity make the leader a role model. Motivation- it is the process of keep people or employees moving forward by fulfilling their needs and ideas and focusing them toward the attainment of the organisational goal with energy and persistence (Buc and Huk, 2010, p.225) LEADERSHIP STYLES Leadership styles mainly deals with the different functions of leadership and the style of leadership towards members of the group or subordinate staffs. They are classified into three styles, namely: Authoritarian (or autocratic) style- it is where the power is with the leader and all the interaction with the group and employees move towards the manager. The leader alone exercises decision making, authority for determining policies, procedures for achieving goals, work tasks and relationships, control of rewards and punishments. Democratic style- it is where the power is mostly with the group and there is a good interaction with in the group. The leadership functions are shared with the group and the manager is also a part of the group. The group members can give their suggestion in decision making, determination of policy and in implementation of systems and procedures Laissez-faire (genuine) style it is were the members of the group and their workings are observed and the power is passed to the members to allow them the freedom of action and no to interfere, but be available if help needed. The members are left to face decisions. There is often confusion over this style of leadership behaviour THEORIES OF LEADERSHIP: Great Men Theory The Trait Theories of Leadership Style Theory Douglas McGregor: Theory X and Theory Y Contingency Theory Behavioural Theories Participative Theories Relationship Theories DIFFERENCE BETWEEN LEADERSHIP AND MANAGEMENT CONCLUSION

The Relationship Between Mass And Acceleration

The Relationship Between Mass And Acceleration Mass is a property of matter equal to the measure of an objects resistance to changes in either the speed or direction of its motion. The mass of an object is not dependent on gravity and therefore is different from but proportional to its weight. Speed is the time rate of change of position of a body without regard to direction. Linear speed is commonly measured in such units as meters per second, miles per hour, or feet per second. Velocity represents speed but according to the bodies direction. We can calculate from a distance time graph with dy/dx.    Acceleration describes the time rate the velocity is changing at. The relationship between acceleration and velocity is like the relationship between velocity and displacement. Acceleration is a vector quantity. For uniform velocity, a = 0. If a is a non-zero constant, the object is said to be uniformly accelerated. The average acceleration of an object is defined as: Average acceleration = change in velocity / time taken In my investigation, I will aim to find the relationship between mass and acceleration. Method I will do this be setting up an apparatus which will measure the rate of acceleration. First, I will set up a height of 15cm and length of 227cm ramp. At this height, I do not have to apply a force to the trolley to accelerate the trolley because it will be able to slide down due to the force of gravity. This way, the force of gravity can be kept constant. Then, I will use a ticker machine and ticker tape to measure the rate of acceleration. I will stick the ticker tape into a trolley of 850g and let it fall. Each 10 mark on the ticker tape represents 0.2 seconds so I will cut the ticker tape in strips of 10 marks. By plotting the strips onto a graph, it would tell us the speed in which the trolley travelled. From this, we can calculate the acceleration of the trolley: Acceleration = final velocity initial velocity =    D v   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Time  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     t I used a ticker machine to calculate the rate of acceleration because it would show the rate in which acceleration changes. If we just timed how long it takes for the trolley to reach the end of the trolley, it would only give us the average acceleration. It would not be possible to measure the change in acceleration. I chose 15cm height ramp because from our preliminary results we found the marks on the ticker tape appeared most clearly at this height. Previously, the height of the ramp was 43cm and it was too high of the marks to appear clearly and because of this, my results werent as accurate. The average angle of the ramp was 3.87  ÃƒÅ'Ã…  . I chose this angle because I found from preliminary results that if the angle is too high, the marks on the ticker tape would not print accurately. Before, the average angle was 10.7  ÃƒÅ'Ã…   and we found it difficult to read the ticker tape. I clamped the ramp in place because this way, the height of the ramp is less prone to change so it acceleration will only be affected by the mass of the trolley. This will make our results more accurate. I added 400g of mass each time because from preliminary tests, I found that the ranges of the results were too close to each other to see a correlation when we added 100g each time. So to make the results more clear to see if mass affects acceleration, I decided to add more weights. This way, there would be a greater difference in the results and it would be clearer to distinguish a correlation. I chose a trolley of 850g because the trolley was light weight and the wheels were fairly smooth. Because it was light weight it would be easier to add mass on and be less affected by friction. Because the wheels were smooth, the frictional force would be less. This will make our results more accurate. To keep my investigation fair, I will only change one factor- the trolleys mass. I will keep everything else the same such as the height of the ramp and the ramp itself because these factors would affect the results if theyre are not kept the same. Prediction I predict that the mass of the trolley will not affect the rate of acceleration. This is because according to Galileos laws of motion, all bodies accelerate at the same rate regardless of their size or mass. For example, the fact that a feather falls slower than a steel ball is due to amount of air resistance that a feather experiences (a lot) versus a steel ball (very little). Also according to Newtons second law, the acceleration and gravitational force of a body is directly proportional to each other. He adds to Galileos law of motion by saying everything falls at the rate of 9.8m/s. He calculates this by: (F=force, m=mass of Earth (), a=acceleration, r=radius of Earth, G=gravitational constant (6.7-10†¾Ãƒ ¡Ã‚ ¶Ã‚ ¥Ãƒ ¡Ã‚ ¶Ã‚ ¥ Nm ²/kg ²), g=gravitational force) If F=ma and F=gm ma=gm So you can cancel m to get a=g Factors which affects the rate of acceleration: Friction would affect the rate of acceleration because it increases the reluctant force by griping on the wheels and increasing the time it takes for the wheels to turn. Sometimes this can be good because it makes cars easier to manoeuvre. To show that friction affects the acceleration, we could carry out the same experiment, but instead of changing the mass, we would add different materials to the ramp. This would show us how surface area affects acceleration. The gradient in which the body is travelling would also affect the acceleration because some of the force would go into the other direction instead of going down so it experiences more drag. This would increase the time it takes for the body to fall. We can show this in our experiment by increasing the angle of the ramp instead of mass. The shape of the body will also affect its acceleration because the more wide it is the more air resistance/ drag it will have. Air resistance slows down an object because it opposes a force in the opposite direct to gravity, so the force of gravity is less. We can show this by changing the size of the surface area of the trolley but keeping mass the same. Results Average Acceleration From the graph, we can see that generally, as the mass increases, so does the acceleration. Theres a steep liner gradient from 850g-1650g, and acceleration increased by 4.82ms†¾Ã‚ ². Even though the actual results shows a decrease in acceleration between 1650g-2100 by 0.53 ms†¾Ã‚ ², the line of best fit tells us it is actually increasing. Overall, acceleration increased by 0.2m/s†¾Ã‚ ² every 100g that was added. Average Speed The average speed shows as the mass increased, so does its speed. There is a liner gradient between 850g-1250, and the speed increased by 1.7cm/s. From 250g-2050g, the speed decreases by 0.75cm/s ². However, from 2050g-2450g, the speed increases again by 0.66cm/s ². Overall, although it decreases, the line of best fit shows that it increases greatly from 850g-1250, then the line starts levelling out from 1250g-1450g. Accuracy Rating The accuracy rating generally shows that as the mass increases, the level of accuracy also increases. This graph shows the higher the number of accuracy, the lower the level of accuracy. There is a huge fall in the number of accuracy rating between 850g-2050. It went from 38.67 to 29, a difference of 9.67. From 850g-2050g, the number of accuracy kept decreasing and overall, it decreased by 14.3. However, from 2050g-2450g, it increased by 2. This may be because as mass increases, the bigger the friction is on the wheels. The larger the friction the better the wheels can grip on the surface so travels more accurately and is less likely to skid. This tells us, the results of acceleration and speed for 850g is very likely to be an outlier because the level of accuracy is very low. Comparison: When we compare the results of the average acceleration to its speed, we can see its directly proportional because as the acceleration increased, so did the speed. This is because acceleration shows how speed changes. When we compare the level of accuracy to the acceleration and speed, it tells us the results for 850g is very likely to be anomalie and possibly 1250g as well. If that were true, the graphs would show that there is no connection an objects mass to its acceleration. This would prove Galileos law of motion and Newtons second law that the rate of acceleration is constant and is not affected by size or mass. However, our experiment does prove their theories are correct because our experiment shows that the less resultant forces oppose to gravity (more friction in this case), the faster the body accelerates and does not depend on its mass. Evaluation I believe my experiment went fairly well because I felt I could justify the reasons why I obtained these results and although I have some anomalies, most of the results were fairly accurate. However, there were some flaws in my experiment such as: I found it hard to set off the trolley at the position on the ramp each time because it was not marked clearly. I did not wipe/grease the ramp after each experiment, doing this would have make the friction of the ramp more consistent When I plotted the strips of ticker tape on the graph, I did not line them accurately on the squares. This made some of my results inaccurate. Improvements To improve my experiment, I would have made the height of the ramp lower because it would experience more friction for the wheels to grip on. I would have also used trolleys with different masses but the same density. This way, drag/air resistance be more likely to be the same so there would only be one factor affecting the results. This would make out results more accurate. To obtained accurate results, we can perform this experiment in a vacuum. This is because in a vacuum, you would not experience any resultant force as you do in Earth so you could accurately calculate acceleration. However, we can only experience a vacuum in space. In earth, to decrease resultant forces, we can carry out this experiment in: Under water High altitude Air tight conditions