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AP Physics 1
5.6 Newton’s Second Law in Rotational Form
5.4 Rotational Inertia
5.3 Torque
IntermediateMCQMathematicalConceptual14.6k
A block of mass m hanging from a string wrapped around a pulley of mass M.
A block of mass m hanging from a string wrapped around a pulley of mass M.
A pulley of mass M and radius R is mounted on a horizontal, frictionless axle. The pulley can be treated as a solid disk with a rotational inertia of I = 1/2 MR^2. A light string is wrapped around the pulley and attached to a block of mass m, which is released from rest and allowed to fall. The string does not slip on the pulley as it unwinds. Which of the following expressions represents the magnitude of the angular acceleration of the pulley as the block falls?

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