This preview shows page 1. Sign up to view the full content.
12.90. Model:
Model the skater as a cylindrical torso with two rodlike arms that are perpendicular to the
axis of the torso in the initial position and collapse into the torso in the final position.
Visualize:
Solve:
For the initial position, the moment of inertia is
1T
o
r
s
o
A
r
m
2.
II
I
=+
The moment of inertia of each arm is
that of a 66 cm long rod rotating about a point 10 cm from its end, and can be found using the parallelaxis
theorem. In the final position, the moment of inertia is
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 12/10/2011 for the course PHYS 1211 taught by Professor Geller during the Fall '09 term at University of Georgia Athens.
 Fall '09
 geller

Click to edit the document details