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Rotational Motion: Torque, angular acceleration, velocity

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A 3.50 kg counterweight is attached to a light cord, which is wound around a spool . The spool is a uniform solid cylinder of radius 8.00 cm and mass 1.40 kg.

(a) What is the net torque on the system about the point O?

(b) When the counterweight has a speed v, the pulley has an angular speed w= v/R. Determine the total angular momentum of the system about O.

(c) Using the fact that torque = dL/dt and your result from (b), calculate the acceleration of the counterweight.

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A block is attached to the string wrapped on a cylindrical pulley, the torque, angular velocity and angular acceleration is calculated.

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