The magnitude of the centripetal force acting on a body of mass $m$ executing uniform motion in a circle of radius $r$ with speed $v$ is
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(b) $\mathrm{P}=\mathrm{mv}$
SO $\mathrm{V}=\mathrm{P} / \mathrm{m}$
so radial force is $=\mathrm{mv}^ 2 / \mathrm{r}$
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