If a particle of mass \( m \) is moving in a horizontal circle of r...

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If a particle of mass \( m \) is moving in a horizontal circle of radius \( r \) with a centripetal force \( \left(-k / r^{2}\right) \), the total
P energy is

WV
(1) \( -\frac{k}{2 r} \)
(2) \( -\frac{k}{r} \)
(3) \( -\frac{2 \mathrm{k}}{\mathrm{r}} \)
(4) \( -\frac{4 k}{r} \)
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