Rotation


A positive acceleration means that the red mass accelerates up, the blue mass accelerates down, and the pulley has a clockwise angular acceleration. All the directions are reversed when the acceleration is negative.

The pulley is assumed to be a solid disk rotating about its center, with a moment of inertia of 0.5 mr2.

Things to think about:

Created by Andrew Duffy, Boston University Physics Department.

Last update October 21, 1998