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## Homework Statement

A sphere with a 3 kg * m^2 moment of inertia about an axis through its center has its angular velocity changed by 4 rad/s owing to a 2 N*m torque applied about that axis for 6s. If its initial angular velocity is 10 rad/s, the change in its rotational kinetic energy in J is...

The answer according to the book is 144 J.

## Homework Equations

1/2Iiwi^2 - 1/2Ifwf^2 = change in Ke

T=I(a)

## The Attempt at a Solution

The wording of the question is kind of throwing me off because i don't understand the part about the Torque.

Thanks