Lesson 36
Rotational Dynamics; Rigid Body Dynammics

Name:faculty Section:M2 Start Time:14:37:58 Instructor:pate Course:355

1) The Great Ramp Race! Suppose three objects of equal mass and radius are perched at the top of a large ramp as shown in the figure. One object is a uniform disk, one is a hoop or ring, and one is a wheel for which nearly all of the mass is concentrated at the center (only a very small amount is in the spokes and the rim). If all are released from the same height at the same time, in what order will they reach the bottom of the ramp? Please explain your answer and your reasoning.



2) Estimate the rotational kinetic energy of a figure skater doing a scratch spin. Please state/explain your assumptions. Does your answer seem like a lot of energy to you?



3) If you apply a net torque to a rigid object,

  1. the angular momentum of the object will change
  2. the kinetic energy of the object will change
  3. the object will experience an angular acceleration
  4. the moment of inertia of the object will change



Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.):

You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.

I received no help from anyone on this assignment.
I received help from someone on this assignment (document in comments section).