A 26 g block hangs from a 350 g rotating solid disk, as shown below. If the radius of the disk is 12 cm, what is the speed of the block after it has dropped 55 cm starting from rest? If a disk with radius 5.0 cm is used instead, how does your answer change?

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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.