A 15 kg uniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 5 kg weight is hanging on the string. The system of the weight and disk are initially at rest. When the 5 kg weight is released, it moves down and the disk rotates.
Consider the point when the 5 kg weight is moving with a speed of 1.3 m/s.
a) What is the kinetic energy of the entire system?
b) How far has the weight fallen?
c) What is the angular acceleration of the disk?
This solution provides assistance determining the kinetic energy of a system, how far the weight has fallen, and the angular acceleration of the disk.