A) A 480.0 g ball moves in a vertical circle on a 88.0 cm-long string. If the speed at the top is 6.20 m/s, then what is the speed at the bottom? (Hint: Use conservation of energy) Assuming that y is positive in the upward direction, what is the gravitational force (in N) acting on the ball?  B) Assuming that y is positive in the upward direction, what is the tension force (in N) acting on the ball when it is at the top? Assuming that y is positive in the upward direction, what is the tension force (in N) acting on the ball when it is at the bottom?

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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.