Lab Activity Phys221: Circular Motion Objective: In this lab activity you will c

Question

Lab Activity Phys221: Circular Motion Objective: In this lab activity you will conduct a number of experiments that involve circular motion (uniform or non-uniform) and analyze them in terms of forces and accelerations. Part A: Measuring a coefficient of static friction with a rotating apparatus and on an. incline You will find the coefficient of static friction between an aluminum ruler and a penny in two different ways: Al: using a rotating ruler A2: using the ruler as an incline. Group Activity (15 minutes): As a group, given the rotating apparatus, come up with two procedures to measure the coefficient of static friction between a penny and the ruler, one using rotation and one using an incline. Ask me for anything than you think you will need (Hint: e.g. a stopwatch). Of procedure must somehow include the rotation of the ruler. Al: Rotation What quantities will you need to measure? What assumptions are you making? A2: Incline What quantities will you need to measure? What assumptions are you making? Pemy

Explanation / Answer

Since your question is not clear I will answer only A1 and A2,
(A1) What quantities will you need to measure?
Ans: Radius of the penny, time to rotate a full circle of the rotating ruler and the velocity of the penny.
****What assumptions are you making?
The only way which the penny will lose its velocity is the friction. there is no other dissipating source of energy.
The surface of the rotating object does not have any bump.
(A2)What quantities will you need to measure?
The radius of the penny, time to rotate a full circle of the penny and the velocity of the penny.
****What assumptions are you making?
The only way which the penny will lose its velocity is the friction. there is no other dissipating source of energy.
It will not jump off the rotating surface.

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