Uniform Circular Motion. An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete can rotate the ball at the rate of 8.00 rev/s when the length of the chain is 0.600 m. When he increases length of 0.900 m, he can rotate the ball only 6.00 rev/s. (a) Which rate of rotation gives the greatest speed for the ball? (b) What is the centripetal acceleration of the ball at 8.00 rev/s? (c) What is the centripetal acceleration of the ball at 6.00 rev/s?

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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.