A 35.0 kg child is on a swing following a circular path with a radius of 3.25 m. As the swing passes through the lowest point of the circular path, the seat exerts a force of 480 N [up] on the child, what is the speed of the swing at that point?

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Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.