timtng
Nov7-03, 11:01 PM
An ice skater doing a toe spin with outstretched arms has an angular velocity of 4 rad/s. She then tucks in her arms, decreasing her moment of inertia by 7.5%
a. What is the resulting angular velocity?
b. By what factor does the skater's kinetic energy change?
For a, I use IW = I'W' >> 1(4rad/s) = (1-.075)W', then solve for W'
I got 4.32 rad/s for W'. I don't know if I'm doing it correctly. Also, I need help on part b.
Thx
a. What is the resulting angular velocity?
b. By what factor does the skater's kinetic energy change?
For a, I use IW = I'W' >> 1(4rad/s) = (1-.075)W', then solve for W'
I got 4.32 rad/s for W'. I don't know if I'm doing it correctly. Also, I need help on part b.
Thx