- #1
LCSphysicist
- 646
- 161
- Homework Statement
- Find the period of a pendulum consisting of a disk of mass M and
radius R fixed to the end of a rod of length I and mass m. How does
the period change if the disk is mounted to the rod by a frictionless bear·
ing so that it is perfectly free to spin? See figure above right
- Relevant Equations
- t = rf
Jcm = mr²/2
I did the first step pretty well, and the answers match, but i don't understand why in the second case the period changes.