Physics

Problem

A wheel with rotational inertia

I

is mounted on a fixed, frictionless axle. The angular speed

\omega

of the wheel is increased from zero to

\omega_{f}

in a time interval T. 12. What is the average power input to the wheel during this time interval? (A)

\frac{I \omega_{f}}{2 T}

(B)

\frac{I \omega_{f}^{2}}{2 T}

(C)

\frac{I \omega_{f}^{2}}{2 T^{2}}

(D)

\frac{I^{2} \omega_{f}}{2 T^{2}}

(A)

\frac{I \omega_{f}}{2 T}

(B)

\frac{I \omega_{f}^{2}}{2 T}

(C)

\frac{I \omega_{f}^{2}}{2 T^{2}}

(D)

\frac{I^{2} \omega_{f}}{2 T^{2}}