**Work and Rotational Kinetic Energy**

Accelerate along a coordinate axis. it does work Won the body. Thus. the body’s kinetic energy (K = !mv2) can change. Suppose it is the only energy.

Now let us consider a rotational situation that is similar. When a torque accelerates a rigid body in rotation about a fixed axis. it does work W on the body. Therefore. the body’s rotational kinetic energy (K = tfw2) can change. Suppose that it is the only energy of the body that changes.

The rate at which the work is done is the power, which we can find with the rotational equivalent.

Summarizes the equations that apply to the rotation of a rigid body about a fixed axis and the corresponding equations for transnational motion.

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