Asked by tyger2020

While punting a football, a kicker rotates his leg about the hip joint. The moment of inertia of the leg is 3.75 kg/m2 and its rotational kinetic energy is 175 J. What is the angular velocity of the leg, in rad/s ?

I'm not even sure where to start...

Answered by bobpursley
rke=1/2 I w^2

w= sqrt(2*rke/I)=sqrt(2*175/3.75) rad/sec
Answered by Damon

Ke = (1/2) I omega^2

175 = (1/2)(3.75) omega^2

solve for omega, the angular velocity
Answered by tyger2020
Thank you!!