Physics

Problem

A solid uniform cylinder of mass

4.0\,\text{kg}

and radius

0.30\,\text{m}

spins about its central axis at an angular speed of

40\,\text{rad/s}

. What is its rotational kinetic energy? a)

7.2\times10^{1}\,\text{J}

2.9\times10^{2}\,\text{J}

1.4\times10^{2}\,\text{J}

1.2\times10^{2}\,\text{J}