A coin of mrss m is placed at the edge of a turntable of radius R. The turntable is rotating uniformly with the maximum possible frequency that allows the coin to be at rest with respect to the turntable. It takes the coin time t to complete one revolution. For the values given below, the coefficient of static friction between the coin and the turntable is, to three significant figures: m = 0.018 kg R = 0.79 m t = 2.19 s

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Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.