Physics Lab Report What Keeps a Stopper Moving in a Circle Essays

Physics Lab Report What Keeps a Stopper Moving in a Circle Essays Physics Lab Report What Keeps a Stopper Moving in a Circle Paper Physics Lab Report What Keeps a Stopper Moving in a Circle Paper Practice whirling the stopper in a horizontal plane until you can keep the paper clip a short distance just below the bottom of the tube. If the paper clip touches the bottom of the tube, then the clamp is no longer supplying the centripetal force. If the paper clips rises or falls appreciably as the stopper whirls then the radius of the circle is changing. B. Constant Radius and Variable Speed 3. With the paper clip against the tube and the string pulled taut, measure the length of the string from the top of the tube to the stopper. Record this as the radius, r, for all three data runs in 4. Whirl the stopper while maintaining a constant force reading on the scale. Once you obtain a constant force, start the stop watch and continue the whirling while monitoring the force. Stop the stopwatch after 30 rev. 5. Record your force and time in data table 1, data run 1. 6. Increase the rate of whirling while maintaining the clip just below the bottom of the tube, and observe what happens to the tension measured by the spring scale. It should increase. Repeat step 4 t this higher spring force. 7. Record your force and time in data table 1, data run 1. 8. Repeat step 6 and record the data in table 1, data run 2. C. Contact force and Variable Radius 9. Change the position of the paper clip to decrease the radius uniform circular motion for the stopper. Try to get as small a radius as you can and still be able to maintain a constant force. 10. Whirl the stopper while maintaining a constant force on the scale. Start the stop watch and continue the whirling while monitoring the force. Stop the stopwatch after 30 rev. 11. Record your force and time in data table 2, data run 1. With the paper clip against the bottom of the tube and the string pulled taut, measure the length of the string from the top of the tube to the stopper. Record this as the radius, r, in table 2, data run 1. 12. Change the position of the paper clip to increase the radius uniform circular motion for the stopper. Repeat step 10 at the same spring force as data run 1 . 13. Record your force and time in data table 2, data run 1. With the paper clip against the bottom of the tube and the string pulled taut, measure the length of the string from the top of the tube to the stopper. Record this as the radius, r, in table 2, data run 2. 14. Repeat step 12 measure the length of the string from the top of the tube to the stopper. Record this as the radius, r, in table 2, data run 2. Number of Revs 30 Table 1 Time ass IIS as Radius 0. 3 m 0. Mm Table 2 8. 94 s ass 0. 1 m 0. 2 m 3. 4. 1 . What does your data show about the relationship between centripetal force and change in speed at a constant radius of circular motion? 1 . As the speed increases the centripetal force also increases. 2. What do your data show about the relationship between radius of circular motion and change in speed at a constant centripetal force? 2. As the radius increases so does the speed of the stopper. 3. Analysis the resulting plot. Is there a pattern? If so what does the pattern mean? 4. Formulate an equation for the relationship between the spring force and the centripetal acceleration of the stopper. What does this equation tell you about the spring force? This shows that the spring force is in direct relation to the centripetal force. 5. Justify the method of recording time for 30 rev to minimize the error associated with calculating the speed of the stopper. In other labs you have used multiple data runs and averaged the data to minimize the random error associated with measuring. Why did you not have to do that on 5. To get the most accurate time we had the person timing also count the revolutions of the stopper. And we didnt have to do multiple data runs because the time is the least important In this lab we found that the variables of circular motion are directly related. We accomplished our goal which was to relate the variables involved in uniform circular motion. I also proved my hypothesis incorrect, my hypothesis was that the velocity of the stopper will increase as the radius is shortened, which in fact as the radius was shortened the velocity decreased. In this lab there were several sources of error, the stopper was spinning so fast we may have miss counted how many revolutions it had, and the force was not constant the entire time.

alcohol essays

alcohol essays ...A CAPITAL OR OTHERWISE INFAMOUS CRIME... ... NOR BE DEPRIVED OF LIFE ... WITHOUT DUE PROCESS OF LAW... THE DEATH PENALTY UPHOLD THE CONSTITUTION BY PROTECTING THE PUBLIC AND RIDDING THE COUNTRY OF OFFENDERS WITH DUE PROCESS OF LAW. From 1882 through 1951 there were 4,730 recorded lynchings by vigilantes in the U.S, with many of them being highly public affairs. Even when miscreants were afforded a trial and executed in accordance with law, such events were often local in nature. For example, while states such as New York electrocuted condemned prisoners at Sing Sings electric chair as early as the late 19th century, in states such as Missouri hangings were conducted at local county jails as late as 1937. The race and the crime seem to play a huge role in the determination of the sentencing. For example if a black male had stolen like a candy bar out of a store, and got 10 years, that proves its more than likely an issue of race than the crime. But also if a black man murders someone, the death penalty is probably going to be a sentence, and a sentence of justice in my opinion. In a lot of state death penalty cases, the race of the victim is much more important than the prior criminal record of the defendant, or the actual circumstances of the crime. A study by the Bureau of Justice stated that more than one-half of people the people on death row are of color. Race and the crime are a very important factor in determining who is going to be sentenced to die. Several studies have been shown that the role of race in the death penalty, they include a study in 1990, a report from the General Accounting Office that stated that in 82 of the cases reviewed the race of the victim was found to influence the punishment for the crime. A black man who kills a white person is 11 times more likely to receive a death sentence than if a white person kills a black stated John Monty of the Bureau of Jus...

Leadership Theories in Organisations Essay Example | Topics and Well Written Essays - 2500 words

Leadership Theories in Organisations - Essay Example There are various theories that explain how entities are led to achieve company’s objectives. Trait approach theory, skills approach theory, transformational leadership theory, situational approach theory, style approach theory, contingency approach theory, path-goal theory and psychodynamic theory are leadership theories to be analyzed. The area of focus is leadership in the construction industry. Sir Michael Latham, Sir John Egan and Ray O’Rouke (Build 2008) have been identified as leaders in the construction industry. According to Chartered Institute of Building (2008), UK’s construction industry does not have highly influential leaders. Trait leadership approach suggests that personal characteristics dictate success and effectiveness of a leader. According to Daft (2007 p. 38), intelligence, honesty and patience are some of the personal characteristics that must be possessed by all leaders. Creativity, self confidence, higher levels of energy, height, self ap pearance, knowledge, speech fluency, popularity, sociability, persistence, hard work and desire to excel are some of the key traits that define leaders (West and West 2006 p. 98; McNeal 2010; Griffin P. 473). In addition, simple acts of kindness can make one a strong and reliable leader (Maxwell & Littleton 2001).Trait approach theory presumes that leaders are born and not made. This theory approach does not seem consistent with the construction sector in the UK. This is because the sector lacks highly influential leaders yet it presumes that leaders are born and not made. Does it mean that of all the employees in the construction sector, there is no single natural leader? It is not possible in the whole industry not to have a single person with all or most of the personal attributes that makes one a natural leader. Most leaders and managers in the construction industry were above forty three years of age. If leaders were born, then the industry could have