# Homework Help: Rotational inertia and torque

1. Dec 2, 2005

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. Dec 2, 2005

### 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).

3. Dec 3, 2005

OK thanks Doc. Now I will try to solve it!

B

Similar Threads for Rotational inertia torque Date
What is the angular acceleration of the rod? Oct 16, 2017
AP Physics 1 textbook flaw? Apr 30, 2017
Rotational Mechanics Question. Feb 6, 2017
Where is wrong in this proof for rotational inertia ? Feb 4, 2017