Question

In: Physics

What is the percentage error on each of the velocities in your experiment? Discuss with your members what could have caused this error.

 

OBJECTIVES:

  1. To determine the potential and kinetic energy of a freely falling body
  2. To determine the loss in kinetic energy of an inelastic collision
  3. To calculate the percentage error of the experimental error of the velocity of a freely falling body using the conservation of mechanical energy of a body

MATERIALS:

  1. Tennis balls
  2. Digital Timer
  3. Meter stick                                                           

THEORY

  1. Conservation of Mechanical Energy
  • A body raised to a certain height possesses potential energy due to its position. Since work was done to lift the body to a certain height, the body gains potential energy. When the body is released from its position, the potential energy is transformed into kinetic energy on its way down. Upon reaching the ground, the potential energy is converted into kinetic energy. Ideally, if there is no loss in kinetic energy, the body should bounce back to its original height. This only happens for a perfectly elastic collision
  1. Inelastic Collision
  • In most situations however, once the body reaches the ground, some of its kinetic energy is lost (e.g., the body undergoes slight deformation upon collision with the ground). The body will then reach a lower maximum height than the original height from which it was dropped. Eventually, the body will lose all its kinetic energy and will rest on the ground once all of its kinetic energy is lost. In this case, the collision is inelastic; that is, kinetic energy is not conserved.

Procedural Instructions:

  1. Decide as a group the original height from which the ball will be dropped. Record this in your data table. After the ball bounces up twice, record also the maximum height reached by the ball for each bounce. Assign one member to note these two maximum heights.
  2. Assign three members to record the time for the ball to reach the ground from its original height, first maximum height, and second maximum height. Note that three members would be needed to measure these different times. Record these in your data table.
  3. Complete your data table to find for the velocity of the ball each time it reaches the ground. You are responsible for the equation that should be used. Using the times and the corresponding heights you have recorded, discuss as a group the appropriate formula to be used and apply them. Record your results in your data table.
  4. Using your equations for kinetic and potential energies, again, discuss as a group the appropriate formula for determining the theoretical value of each velocity you have computed and apply it. Record your results in your data table.
  5. Compute for the percentage error for each velocity.

QUESTIONS AND PROBLEMS

  1. What is the percentage error on each of the velocities in your experiment? Discuss with your members what could have caused this error.
  2. How is the loss in the kinetic energy manifested by the ball each time it reaches the ground?
  3. In your experiment, calculate the kinetic and potential energies when the ball was on its midway down the first, the second, and the third time. What can you conclude about the total mechanical energy of the ball as its falls down the ground?

DATA TABLE

h1=10m,h2=5,h3=0

Initial Max Height

Second Max Height

Third Max Height

Potential Energy          (from Max Height)

200t 100t 0

Kinetic Energy               (upon reaching ground)

0 1wj 2wj

Time

1sec 1sec 1sec

Experimental Velocity

0 5.1 9.9

Theoretical Velocity

0 5 10

Percent Error0,2,1

Solutions

Expert Solution


Related Solutions

QUESTIONS AND PROBLEMS: 1. What is the percentage error on each of the velocities in your...
QUESTIONS AND PROBLEMS: 1. What is the percentage error on each of the velocities in your experiment? Discuss what could have caused this error. 2. How is the loss in the kinetic energy manifested by the ball each time it reaches the ground? 3. In your experiment, calculate the kinetic and potential energies when the ball was on its midway down the first, the second, and the third time. What can you conclude about the total mechanical energy of the...
Describe the possible sources of error in the experiment. How could you improve the experiment?
Describe the possible sources of error in the experiment. How could you improve the experiment?
Discuss what caused hyperinflation in Zimbabwe and if you think this could happen in The United...
Discuss what caused hyperinflation in Zimbabwe and if you think this could happen in The United States.
what are at least two errors that may have it could have happened in the experiment
what are at least two errors that may have it could have happened in the experiment
What percentage of commercial airplane accidents have resulted from pilot error? This includes mismanagement of flight...
What percentage of commercial airplane accidents have resulted from pilot error? This includes mismanagement of flight systems, poor judgement and not maintaining proper situational awarness. Please do not include orher human factors. Also please list your reference that supports the claim.
Some people can have atypical karyotypes, which are caused by an error during one of the...
Some people can have atypical karyotypes, which are caused by an error during one of the processes of cell division. Which process would an error result in an individual having either an extra or a missing chromosome? A. Mitosis B. Meiosis C. Both D. Neither
What could you do if you wanted to reduce your chances of Type I Error?
What could you do if you wanted to reduce your chances of Type I Error?
Each of the following situations describes error in a statistical experiment, where a researcher is trying...
Each of the following situations describes error in a statistical experiment, where a researcher is trying to find the percentage of American college students who identify as Democrats or Republicans. State whether this is sampling or non-sampling error, and explain why you chose that answer. The researcher randomly selects 400 college students from around the country and asks them if they are Democrats or Republicans. The researcher finds that 38% of the students are Democrats, when the actual percentage is...
Discuss the Clostridium family of bacteria. Name the 4 main pathogenic members, and what each is...
Discuss the Clostridium family of bacteria. Name the 4 main pathogenic members, and what each is famous for. Also include the 3 features all pathogenic members of this family share
Discuss what caused the financial crisis and why that caused such a large amount of banks...
Discuss what caused the financial crisis and why that caused such a large amount of banks to fail.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT