51. A potter's wheel is initially at rest. A constant external torque of 75.0 N.m is applied to the wheel for 15.0 s, giving the wheel an angular speed of 5.00 x 10² rev/min. (a) What is the moment of inertia of the wheel? (b) The external torque is then removed, and a brake is applied. If it takes the wheel 2.00 x 10² s to come to rest after the brake is applied, what is the magnitude of the torque exerted by the brake? Example 9-3

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