Explain, in one or two sentences, why exerting a non-zero net torque on a rigid body…

PHYSICS · Subjective · AP · Physics 1: Algebra-based · Energy and Momentum of Rotating Systems · Energy and Momentum of Rotating Systems

Problem

Explain, in one or two sentences, why exerting a non-zero net torque on a rigid body as it turns through some angle necessarily changes the body’s rotational kinetic energy, even if its center-of-mass speed is unchanged.

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