Problem 2: A 0.5 kg turntable with a radius of 15 cm is rotating 78 times per minute. A. What is the angular momentum of the turntable? B.A 100 gram bar which is as long as the diameter of the turntable is dropped on the turntable such that the bar is rotating about its center. What is the new angular velocity of the turntable-bar system? C. In order to stop the turntable and bar in just one rotation, how much force must be applied to the edge of the turntable (assuming the force is applied perpendicular to the radius)?

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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.