Q.Explain the concept of centripetal force.

Centripetal force is the net inward (centre-directed) force needed to keep a body moving on a circular path.

Any body moving with speed $v$ on a circular path of radius $r$ has an acceleration directed towards the centre of the circle, called centripetal acceleration, of magnitude $a_c = v^2/r$ (equivalently $\omega^2 r$). By Newton's second law, this acceleration must be produced by a net force directed towards the centre — this is the centripetal force,

$F_c = \frac{mv^2}{r} = m\omega^2 r$

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