In the game of tetherball a rope with length L=1.40 m connects a ball with mass m=0.600 kg to the top of a vertical pole so that the ball can spin around the pole as shown in the figure. What is the speed ?v of the ball as it rotates around the pole when the angle θ of the rope is 30.0∘ with the vertical?

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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.