Finding the coefficient of friction: Application Experiment

Aim

Determine the coefficient of kinetic friction between the tissue box and the table.

Prior Knowledge

  • Conservation of momentum
  • Transformation of energy
  • Kinetic energy, gravitational potential energy, internal energy, work
  • Friction force, static friction force, kinetic friction force
Description of the Experiment

Observe the two experiments below. Use each to determine the coefficient of kinetic friction between the tissue box and the table. List all of the assumptions that you made. Describe how you will use the video to determine the necessary quantities. List all physics explanations/relationships you will use to determine the coefficient of friction. Describe the mathematical procedure that you will use to find the coefficient of kinetic friction from the measured physical quantities. Decide whether you have a reasonable agreement between the results of the two experiments.

Addtional Information

Carefully examine the assumptions that you use.

The flour-filled balloon has a mass of 54.7g, the tissue-box has a mass of 161.1g.

Frame rate:
15fps

Size:
480 X 360

File Size:
1.00Mb
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Questions

  1. What physics explanations/relationships did you use to find the coefficient of friction?
  2. Did the assumptions that you made allow you to use these explanations/relationships?
  3. Describe the processes that occurred in the second experiment from the point of view of energy. What is the system that you chose for your analysis?
  4. Describe the processes that occurred in the second experiment from the point of view of momentum. What is the system that you chose for your analysis?
  5. Did the results from the two experiments match? If not, how do you need to modify your assumptions to change the mathematical procedure?