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 ?

Question

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...

bobpursley · Answer

rke=1/2 I w^2 w= sqrt(2*rke/I)=sqrt(2*175/3.75) rad/sec

Damon · Answer

Ke = (1/2) I omega^2 175 = (1/2)(3.75) omega^2 solve for omega, the angular velocity

tyger2020 · Answer

Thank you!!