- #1
sp3sp2sp
- 100
- 4
Homework Statement
A drum major twirls a 94-cm-long, 500 g baton about its center of mass at 150 rpm. What is the baton's rotational kinetic energy?
Homework Equations
KE_rot = 0.5 I w^2
The Attempt at a Solution
w = (150rpm*2pi)/60 = 15.708rad/s
I = (1/12)*0.5kg * 0.94m = 0.039167kg*m^2
KE_rot = 0.5 I w^2
KE_rot = 0.5(0.039167)(15.708rad/s)^2
= 4.8J
says wrong answer.
Cant figure out what I am doing wrong
thanks for any help