Homework Help: Spinning Disks

1. Nov 26, 2005

twjtiger

Another one that I cant figure out.

A solid disk of mass 5.0 kg and a radius of 15.0 cm is rotating with a constant angular velocity of 10.0 rad/sec. Another disk, with the same radius but a mass of 8.0 kg, is slowly dropped upon the first disk until they rotate together. Determine the angular velocity of the system after the two disks are attached.

2. Nov 26, 2005

ONJ's Noble Steed

Conservation of angular momentum!

3. Nov 26, 2005

Harmeet Singh

It would be approximtely 3.8 rad/s

4. Nov 26, 2005