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Rotational inertia and torque

  1. Dec 2, 2005 #1
    HI ,I dont get the correct answer the the following problem.

    A 3kg solid wheel , rolling without slipping on a horizontal surface has a rotational inertia about its given by (MR^2)/2, where M is its mass and R its radius, A force applied to the axle and the center of mass has an acceleration of 2.0m/s^2.
    What are the magnitudes of the applied force and the frictional force of the surface?

    Here I can not visualize how the force is applied

    Thank you
  2. jcsd
  3. Dec 2, 2005 #2

    Doc Al

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    Staff: Mentor

    Although not specified, I assume the applied force is horizontal. So I visualize the setup like so: Imagine the disk rolling to the right. The force is applied directly at the center of the disk (imagine a chain attached to the axle) and points to the right. You are given the acceleration. Use that info to figure out the forces (using Newton's 2nd law).
  4. Dec 3, 2005 #3
    OK thanks Doc. Now I will try to solve it!

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