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The spool is a uniform solid cylinder of radius 8.00 cm and mass 1.40 kg.

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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