A lead ball of mass 0.25 kg is swung round on the end of a sing, so that the ball moves in a horizontal circle of radius 1.5 m. The ball travels Compeed of 8.6 ms. a) (i) Calculate the angle, in degrees, through which the string turns in 0.40 s. (ii) Calculate the tension in the string. You may assume that the string is b)horizontal The string will break when the tension exceeds 60 N. Calculate the number of revolutions that the ball makes in one second when the tension is 60.N. c)Discuss the motion of the ball in terms of the forces that act on it. In particular, explain how Newton's laws of motion apply to its motion in a circle.

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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.