Work based on the experimental cycle testing Newtons Essay Example for Free

Work based on the experimental cycle testing Newtons Essay Introduction: For this piece of coursework I have chosen to look at the laws of impact on a pool table. This will involve making initial assumption that will be made from inspection of the model and experience in playing the game. With these assumptions in mind I will carry out an experiment on the table to justify or correct my assumptions. After a clear understanding of the reality of the model I will attempt to compile a few practical points that will improve the performance of the player when they are playing in the specific environment that is being modelled. The models environment: There are many shots that can be played on the pool table that require different aspects of skill. The specific environment that I will be testing is the snookered shot. This means there is a ball between the cue ball and my colour (red). One of the options I have is to rebound the shot off the cushion and hit the ball. This would normally require experience in order to be accurate enough to hit the cushion in the right place. The model I will be testing will help the play know where to hit the cushion in order to hit the red ball. The elasticity of the cushion and the velocity of the ball are variables when determining the impulse from the cushion on the ball, this will affect the angle on the cushion. Assumptions: Due to my experience with playing pool I have formulated a few important factors for the experiement. I will start by looking at the constants these include velocity, which will remain the same through out the experiment. The next is the momentum, which will be treated as having been conserved and not lost in the collision with the cushion. These two points will allow me to use a basic model that uses only the knowledge I have acquired. In addition to this I will exclude the effect of sliding or spin on the ball, the motion of this is too difficult for me to model. The model: Newtons laws of impacts state that the initial speeds U1 and U2 collide so that final speeds V1 and V2 are produced under the effect of the coefficient of restitution. This can be written as: (e is the coefficient of restitution) This is the same as writing: This can be changed into component form to show the following: Parallel the cushion component   Momentum is conserved. Perpendicular to the cushion component. By showing the perpendicular component in comparison to the parallel component a final model is produced. With this model I can use the pool table to find the both angles with out using velocities or momentums. Predictions: By using this model I will take a value for the coefficient restitution as 0. 8. This value was acquired from a web site called www. gamasutra. com/features/20000516/lander_pfv. htm, which was about making a computer model of the pool game. The site was demonstrating the effect spin would have on the ball in the computer game. Below are the results from using the model. From inspection all the values for ?are less than ? by an average of 4. 5 degrees. This shows the effect the coefficient of friction and the elasticity of the cushions on the table. Method: The first part to the method was to collect the correct apparatus. This included finding a ramp to launch the ball each time. This is more suitable that a cue because I could keep the velocity constant with the ramp. No ramp existed for launching snooker balls so I made one using a mudguard mounted on a wood frame. The ramp was made so that the ball rolled down the rims of the guard so that it did not hit the screw fixing along the centre of the mudguard seen in the picture. The ramp was modified so that just before the end of the ramp the rims were made wider so that the ball was released on to the surface without bouncing. The ramp was tested before the experiment so see if it was accurate enough to hit the same point consistently, which it achieved. The ramp also considered the height the ball was released every launch by a notch at the top of the ramp. (see picture) The ball was held at the top of the ramp by a single figure holding the centre of the ball, this reduced spin on the ball when travelling down the slope. The same ball was used every launch to eliminate variables. The ramp was positioned on the surface so that it was always the same distance for a marked point on the cushion. The ramp was moved along this perimeter to change the angle of approach. To position the ramp I used trigonometry using the lengths of two cushions. Below is an example of the calculations required to put the ramp in the exact place. This value was then measured up the black line on the diagram above and traced onto the perimeter of the cushion points semi circle. This method was accurate but as the angle increased the ramp was moved closer to the cushion opposite the marker point. This meant the table was too narrow to continue readings, so I had to change the adjacent length to allow the readings to continue. When the ramp was correctly lined up, which was done by trial and improvement of rolling balls down the ramp, I ran the test three times to get an average. Each run of the experiment measured the distance from the cushion to the perpendicular cushion where the ball had hit. This was then processed in the same way but the opposite way round. This was then repeated for all the angles between 10? and 90?. All the readings taken were measured to the nearest 0. 5 of a cm. This has been taken into consideration in the table of results. The pictures show the markings in chalk on the table. The picture to the left has the 50? , 70? and 90? markings on it. Results: This table continues to show the coefficient of restitution as a result from comparing the two angles. These values for the coefficient of restitution varied from 0. 5495 to 0. 7535, which showed that the collisions were not constant. This is down to either inconstancies in launching the ball or different frictional values along the balls path that could cause spin. Before I analyse the results more carefully I will point out the values in the table that I think are the most reliable. The values include 0. 7062, 0. 7277 and 0. 7535; these are taken from the angles ranging between 50? , 60? and 70?. At these angles the collision between the ball and the cushion is more consistent and there is less component force parallel to the cushion to make the ball slide through the mark on the cushion. The graph shows the upper and lower bound for the coefficient of restitution, it was necessary to include the upper and lower bounds due to the inaccuracies of the measured angles. The lengths were measured to the nearest millimetre. The prediction stated that the coefficient of restitution should be constant at 0. 8. The results show that the coefficient never reaches this level so there is clearly a factor that needs explaining. The difference is probably because of the frictional effect on the ball and a variation of spin on the ball as it rolled down the ramp. Also there would have been slight inconsistencies in my method due to human inaccuracy. Corrections On review of the method I have found that the I have translated the model into my method with a small mistake. The angles that I initially measured were measuring from the wrong point on the ball. The trig method I used meant the balls centre had to hit the cushion; instead it was the surface of the ball. To correct this mistake I had to look at the diameter of the ball and decrease the according lengths. The balls diameter was 52 mm so this meant I had to decrease the two measurements perpendicular to the cushion. These were D1 and D2, the table below shows the corrections made followed by the corrected graph. These corrections changed the angles of ? so that the smaller angles got smaller and larger angles stayed the same. This had the effect of deducing the coefficient of restitution for the smaller angles but not for the larger angles. This is why the corrected graph starts lower and then maps onto the original graph. As well as the variation due to human inaccuracy in measuring shown above there are other forms of variation that affected my results, these were spin and sliding. The effect of these is too complicated so I have explained them and drawn diagrams to give an idea. Both of these could have changed the results by an unknown amount. Due to personal experience of the game it is usually for the ball to slide more along the cushion at smaller angles, this could be because of friction and would explain the difference between my results and the predictions. On the diagram is shown the ball sliding through the mark. The ball is supposed to hit the black mark, but instead hits at the red mark and rolls along the cushion to leave at the light green mark. Concise points for improving the players games * With small angles of attack the player must realize that the ball will be at a higher chance of experiencing sliding so will depart the collision at a smaller angle. * For high angles of attack the angle of departure will be slightly under the angle of approach. Evaluation To improve this experiment to get the best possible results from it think the introduction of a video camera could help position the ball on the cushion. This would work by having a measure attached to the side of the table and then video taping the balls cushion with the cushions. This would give more accurate marks. To reduce spin on the ball I would add a rubber surface to the ramp to ensure the ball had to roll down the slope and not spin or slide. This would set the ball rolling and so the points where the ball collided would be more accurate. The predictions came from a source off the Internet and they might not be the correct for the pool table I used. The predicted coefficient was an average for most pool tables, but really in order to evaluate this method I need the accurate coefficient for my table. This could be found by using light gates to measure the speed of the ball off the ramp and after the collision with the cushion. The speed of departure over the speed of approach would have given me the correct coefficient to compare to my results. Overall the correlation between the predicted results and my results is very bad, this means that my model is very basic and does not look at the effects on the table, such as spin and sliding. The model comparison has show me the effect of the certain variables and hopefully will improve my future games. Mechanics 2 Coursework James Ashley-Smith.

Liberal Equality Essay -- Political Science

Throughout the ages, the principles of equality and liberty have been a subject of great disputes. Liberal minimalism [1] holds a distinct outlook in the explicit implications of these expressions. For a minimalist democracy must strive to primary reduce control of authoritarian power through restraining most if not all constraints to the individual, allowing them to dictate their own lives by implementing a representative government. In addition, it implements an equal, consistent, and indiscriminate regulation. Thus effectively preventing tyranny, and creating equality before the law, irrelevant to the citizen’s position, which denies high ranking individuals legal advantages seen during the feudal era. Accordingly, the rule of law comes across to liberals as their greatest triumph, for they perceive it as the lawful representation of equality and liberty. There are numerous critics of the liberal minimalist interpretation of equality and social liberty before the law. Such as inequalities of opportunity, and material inequality which results in exploitation. However, liberals will reject â€Å"to impose upon the public a consciously selected model of distribution, whether it promotes equality or of inequality.†[2] Numerous critics agree that capitalism in the liberal minimalist model does not depict true equality and thus is problematic. Critics such as Sherman dispute that it produces "formal equality, such as civil rights, yet presents actual ongoing inequality for employees (Sherman, 1990)[3]. Nevertheless, despite the fact that liberals may possibly appear to support significant material equity, they will be cautious of forcefully creating this result through authoritarianism on the basis of their belief.[4] The reduced goal... ...27 11, Cohen G, 1989, Labor and Freedom, Oxford University Press, Oxford 12, (Marx, economic and philosophical manuscripts, p.120-31, Ollman, 1971). 13 Friedman M, 1962, Capitalism and Freedom, Chicago University Press 14 Frank R. and Cook P, 1996, The Winner-Take-All Society, Penguin press, New York: Penguin 15 Graham G, 2006, Postcapitalist Politics, University of Minnesota Press, Minneapolis 16 Street, P. Capitalism and Democracy "Don't Mix Very Well", February, 2000. 17 Rothbart M, 1998, The Ethics of Liberty: chp 14, Children and Rights,. New York University press, New York 18 Hayek F, 1994, The Road to Serfdom, Chicago University press, Chicago 19 Hayek F, 1994, The Road to Serfdom, Chicago University press, Chicago 20 Hayek F, 1994, The Road to Serfdom, Chicago University press, Chicago Liberal Equality Essay -- Political Science Throughout the ages, the principles of equality and liberty have been a subject of great disputes. Liberal minimalism [1] holds a distinct outlook in the explicit implications of these expressions. For a minimalist democracy must strive to primary reduce control of authoritarian power through restraining most if not all constraints to the individual, allowing them to dictate their own lives by implementing a representative government. In addition, it implements an equal, consistent, and indiscriminate regulation. Thus effectively preventing tyranny, and creating equality before the law, irrelevant to the citizen’s position, which denies high ranking individuals legal advantages seen during the feudal era. Accordingly, the rule of law comes across to liberals as their greatest triumph, for they perceive it as the lawful representation of equality and liberty. There are numerous critics of the liberal minimalist interpretation of equality and social liberty before the law. Such as inequalities of opportunity, and material inequality which results in exploitation. However, liberals will reject â€Å"to impose upon the public a consciously selected model of distribution, whether it promotes equality or of inequality.†[2] Numerous critics agree that capitalism in the liberal minimalist model does not depict true equality and thus is problematic. Critics such as Sherman dispute that it produces "formal equality, such as civil rights, yet presents actual ongoing inequality for employees (Sherman, 1990)[3]. Nevertheless, despite the fact that liberals may possibly appear to support significant material equity, they will be cautious of forcefully creating this result through authoritarianism on the basis of their belief.[4] The reduced goal... ...27 11, Cohen G, 1989, Labor and Freedom, Oxford University Press, Oxford 12, (Marx, economic and philosophical manuscripts, p.120-31, Ollman, 1971). 13 Friedman M, 1962, Capitalism and Freedom, Chicago University Press 14 Frank R. and Cook P, 1996, The Winner-Take-All Society, Penguin press, New York: Penguin 15 Graham G, 2006, Postcapitalist Politics, University of Minnesota Press, Minneapolis 16 Street, P. Capitalism and Democracy "Don't Mix Very Well", February, 2000. 17 Rothbart M, 1998, The Ethics of Liberty: chp 14, Children and Rights,. New York University press, New York 18 Hayek F, 1994, The Road to Serfdom, Chicago University press, Chicago 19 Hayek F, 1994, The Road to Serfdom, Chicago University press, Chicago 20 Hayek F, 1994, The Road to Serfdom, Chicago University press, Chicago

Exams Should Be Abolished Essay

Exams – a word that many students dread to hear, a word that many students fear of, a word that seems to have the magical power to transform a happy and cheerful person into a frustrated and nervous wreck. What are exams and should they been done away with entirely? Exams are longer and more comprehensive versions of tests held every term. Initially created to monitor and check how a student was performing academically, they now have so much more pressure on them that students are burning the midnight oil to study for an exam. This results in some students becoming ill due to stress and lack of sleep. They have become more and more stressful and, even worse, a constriction to the ideal of learning. It is a well known fact that when it comes to exams, students compete, not only with themselves, but with other students. They no longer want to see an increase in their knowledge, but want to beat other people to the top of the class. Even parents take exams as a race to see whose children are more intelligent. Read more: If There Were No Exams Students shouldn’t be judged on their performance on one day when they might be ill. The exams might not be completely representative of the student’s skills as everyone can have a bad day. They are a poor method of assessment as they don’t reflect the use of knowledge in a practical environment. They don’t reflect how well you’ll be able to use your knowledge in real world occupations. Many successful individuals are bad at exams but can perform well under other methods of assessment such as essays and oral presentations which still prepare students in coping with pressure. Some people would argue that exams are not a fair assessment of intelligence and aren’t favourable to those with poor memory skills, those who suffer under pressure, and those who get so nervous in such situations that they shut down in exams. It’s  very easy to know content but to completely fail an exam because you are nervous. They aren’t an accurate representation of a student’s knowledge as some people are just better at taking exams than others. If you happen to mess up in your exams due to stress or panic then your goals can disintegrate leaving you unable to reach your full potential and having to settle for second best.

Motivation case study Essay

When i ï ¬ rst heard that the manger assigned me to be the lead the Customer Relations team i was very happy. but when start to work there i found some motivation issue with the section. as we all know the motivation is the most important thing in the work environment, and the real challenge is to keep your employees always motivated. So i did so research about the best strategy and approach to use and her the result. Applying the same strategies you use with all of your employees won’t be as productive or eï ¬â‚¬ective withe every one, so we have to know what is the suitable theory and approach for each group. you have to keep the enthusiastic and motivated employees and improve their performance. in this case the most eï ¬â‚¬ected theory will be Goal setting theory. the research showed that there are a strong relationship between how speciï ¬ c and diï ¬Æ'cult was the goal and the people’s performance at the mission. And thus the more diï ¬Æ'cult and challenging are the tasks, they will have a higher rate of performance. This is What the goal setting theory all about. to achieve the best result from this theory, the goal must have ï ¬ ve principle: clear, challenging goals and commit the employees to achieving them. Provide feedback on goal performance, considerate the complexity of the task. if we apply this theory in this group of employees the overall performance will improve, because there always be some task and goal to achieve and that will keep them enthusiastic and motivated. In addition, we can apply the Job enlargement Approach and add more variety to there work by tasks. To understand the unenthusiastic and obstinate employees of your ï ¬ rm and make  them more eï ¬Æ'ciency and productivity in there performance you ï ¬ rst have to understand there needs and motivation of work. this is fundamental part between the leader and the employees (emotional control), because when the follower known that the leader is looking after them they will give their best in return. For this group of employees the best theory will be (Maslow’s Need Hierarchy Theory). Maslow’s Need Hierarchy Theory Published by psychologist Abraham Maslow. † this theory contends that as humans strive to meet our most basic needs, we also seek to satisfy a higher set of needs†. Maslow presents this set of needs as a hierarchy, consisting of: Physiological, Safety, Love, Self-esteem, Self-actualization. This theory will eï ¬â‚¬ected in this group for 2 reasons: By understanding the employees needs you will recognize that the money don’t solve everything. the people have many need you cant achieved by hard cash.Theory give the Manager the ability to satisfy the employees without costly. its not expensive to create safety environment for them or to have team social where 3 EMPLOYEE MOTIVATION they get to know each other. that will help them to be more enthusiastic and less obstinate. on the other hand we can apply Job rotation Approach and moving the unenthusiastic employees to other sections where they can be more comfortable and enthusiastic. The main reason for the high absenteeism and poor attitude toward the customer is dissatisfaction with the work environment.If we want to ï ¬ x this problem, we ï ¬ rst have to know what are the things that bother the staï ¬â‚¬. Herzberg’s Motivator theory can help us to discover what are the things that make the employees Satisfaction and Dissatisfaction. the theory said that the The opposite of Satisfaction is No Satisfaction and The opposite of Dissatisfaction is No Dissatisfaction. therefor we have ï ¬ rst to Eliminate Job Dissatisfaction (hygiene factors) such as Security, Status, Salary and Company Policies. Then Create Conditions for Job Satisfaction such as Achievement, Recognition and Responsibility. After we ï ¬ nish this two step the people will start to be more Satisfaction and motivated by the work environment. the best theory for ambitious and want to advance in the organization employees is McClelland’s Human Motivation Theory. According to the theory, each person have diï ¬â‚¬erent dominant motivators, whether these are the needs for power, achievement or aï ¬Æ'liation. by knowing which dominant motivators work for each person in your team, you can structure praise and rewards eï ¬â‚¬ectively. Also by using this theory you will help your employees to be more achievable and ambitious. In the next few lines I will explain the pest program to keep the your employees motivated and enthusiastic According to my research.  Try to make the work environment more comfortable and pleasant as possible, especially for the employees with low-skill and monotonous roles. Additionally, don’t forget to Reward your team, even by saying â€Å"thank you† for them even if they do a small job. Let them having control some time, when the people feeling that they have the control of what tasks and project they can, that give the more job satisfaction. People with low ambitious usually go for low state job, So you have to make them feel proud of what they did and treat them equally with the other employees even in the rewards. The best approach that you can use here is â€Å"Job Enrichment†, which mean simply â€Å"Increasing Job Satisfaction†.When your work assignments reï ¬â€šect task identity, a good level of skill variety, task signiï ¬ cance, autonomy, and feedback, your employees are likely be much more satisfaction, also have high work eï ¬â‚¬ectiveness and high intrinsic work motivation. EMPLOYEE MOTIVATION CONCLUSION: understanding that factors that motivate your employees is the most signiï ¬ cant part of your role as the manager. Also that will help your business to improve. More ever, providing the best environment will help you to keep them motivated and satisfaction. As a manager you have to be close to your employees and know they needs Individually. 3

Media culture Essays - Hip Hop, BET, African-American Culture

Media culture Essays - Hip Hop, BET, African-American Culture Byron Williams Jillian Weber 19 April 2013 ENGL 102 Essay 3 Media culture heavily influences those who consume it. It is how we get our news, entertainment, and other information. Media sources often portray accurate images and reflections of citizens who want their 15 minutes of fame or just want their opinion heard. However, the more modern depiction of Black people in America doesnt sit well with Black people in America. As an African American male, I witness the misconstrued images of black men and women tarnish the reality of our everyday lives. Those seen on TV are glorified more often than criticized, and can be humorous to other viewing races. This allows members of other ethnicities to quickly generalize that he/she must be like the people I see on television. Sadly, this opens the door for more racial assumptions and the perpetuation of common stereotypes. Before extensively detailing how the inaccurate portrayal of African Americans has been a tool for racism, let me commend those who have done their part in displaying excellence and high standards for being an African American. Professional Black actors and entertainers are among the most monitored and scrutinized within black media culture. Music and television almost controls our opinions and as it changes, sure enough so do we. These people are seen as role-models young children who absorb even the slightest things they do. Positive black mentors arent tough to find in the media, but those identified will be placed under a more sensitive microscope. This is because African American citizens realize the dire need for positive influences; our present and our future are greatly dependent upon it. Oprah Winfrey is the ideal African American woman in todays society. She is completely independent, has a warm personality, brings humorous energy, and quietly-kept sexual desires. Since her rise to power, she has feminized the public sphere and put emphasis on emotions and how they tie into corporal matters. Her following is cult-like and she is seen as the most powerful woman outside of the White House. As much as America adores Ms. Winfrey, black women are the most misperceived demographic in our country. Black women were once thought of as strong, nurturing females who could stretch a penny. For example, the 70s family sitcom Good Times was about a black Chicago family faced with poverty and racism; yet they manage to pull through and stay together. They show expresses humility in African Americans, reminding us either of how bad things can get or to appreciate lifes free gifts (family, love, freedom). The mother of the show was named Florida Evans. She is hard-working and persis tent enough to keep the family satisfied and sane. To viewing American , Florida, but more importantly, black women were seen as mammythe big-bosomed, cheerful laughing caretaker to whom young white children could go to and have their problems wiped away by a few words and a hug. It was during this time when Black women were treasures in American society and they were the biggest contributors to love that the country had ever seen. Even with Oprah sitting on her throne as queen of the media and Florida Evans history as the backbone of a family, there still resides detest for our women. From advertisements that make darker skin seem ugly, to psychologist Satoshi Kanazawa, claiming that black women are ugly due to high testosterone levels, this country hates black women. Once perceived as optimal maternal figures, black women are known as ratchets, tricks, and (the big one) bitches. How the change in perception occurred is vaguely known but the consequences of this change are crippling African American women of all ages. This shift in thinking has forced Black women out of the conversation about how they should be shown and how they should act. Despite Oprah claiming that every womans destiny is in her own hands, black women no longer control who they are. The VH1 reality show Love and Hip Hop: Atlanta has been a favorite for Black people across America and continues into its second season this week. Clearly the series is tailored to African American requests by involving hip hop, Atlanta luxury, and beautiful black women. Cameras follow the lives of different individuals

Managed care backlash Essay Example | Topics and Well Written Essays - 250 words

Managed care backlash - Essay Example The notion of gatekeeping generally represents laying down the requirement of visiting healthcare specialists only after getting a referral from a primary physician. On the other hand, the practice of utilization review denotes submission of the proposed processes to the respective insurers and more importantly introduction of a potential denial for covering experimental or expensive treatments (Pinkovskiy, 2013). Though managed care enabled the insurers to reimburse the physicians as well as the hospitals in return for the functions or the procedures performed by them, the practice did not intervened treatment choices of the physicians. This eventually restricted the medical practitioners to provide effective care to the patients, as they lack in selecting best practices associated with delivering quality along with effective healthcare to the patients. Specially mentioning, there exist certain situations based on which the impacts of managed care backlash particularly on reimbursement can be witnessed. In this context, such situations were reckoned to be lowering treatment quality on behalf of medical specialists and limiting patient choices among others (Sekhri,

To what extent can The Girl with the Dragon Tattoo (2009) be described Essay

To what extent can The Girl with the Dragon Tattoo (2009) be described as a feminist text - Essay Example Additionally, she was drug abused and a lonely woman being suffering the miseries of her life through the hands of his own people. However, she has been shown as a strong woman who takes revenge along with justifying his stance. The storyline is quite captivating in every regard making readers and viewers to enjoy every bit of it (Larsson, 2011). Though, a number of critiques have stated that the movie revolves around the subject of feminist where huge focus has been on highlighting the position and power of women in the society against the men (Newman, 2011). Additionally, with a strong plot, the movie also questions the deeds of men in the society and crimes committed by them in the form of rapes and murders. Being a string gender, the acts of men in the society and especially in the settings of Sweden have been closely analysed through the lenses of feminist approach. On the other hand, the movie supporters stated that the mainly because of the female protagonist, there have been talks about the film being a feminist text but in reality, it touches social issues that need to be understood from women’s’ perspectives (Bourke, 2007). Based on this, the discussion will revolve around analysing the fact to what extent the movie can be described as a feminist text along with discussing about the crime, sexuality, and gender in Sweden in a critical manner. The movie has some serious drama, sexual explicit, physical abuses, rapes, murders, and crime scenes that can be alluring and saddening but showcasing the reality to an extent prevailing in the backdrop of a country like Sweden. The movie shows that the publisher of the Millennium Magazine loses a case involving allegations that were published by him about the billionaire financier Wennerstrom. He was sentenced to three months of imprisonment. The female protagonist in the form of Lisbeth Slander was hired by Vanger, the patriarch of