Two friction wheels A and B are both rotating freely at 300 rpm counterclockwise when they are brought into contact. After 12 s of slippage, during which time each wheel has a constant angular accel- eration, wheel B reaches a final angular velocity of 75 rpm coun- terclockwise. Determine (a) the angular acceleration of each wheel during the period of slippage, (b) the time at which the angular veloc- ity of wheel A is equal to zero.
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