Physics

Problem

A uniform solid disk of mass

2.0\,\text{kg}

and radius

0.50\,\text{m}

spins freely at

10\,\text{rad}\,\text{s}^{-1}

. A

0.20\,\text{kg}

lump of clay stuck to the rim is slowly moved to the disk’s center without external torque. Calculate the work that must be done to move the clay (in joules).

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