inclined roof

A 1.5-lb brick is released from rest A and slides down the inclined roof. If the coefficient of friction between the roof and the brick is  = 0.3, determine the speed at which the brick strikes the gutter G.

A. v = 3.00 ft/s
B. v = 2.68 ft/s
C. v = 5.61 ft/s
D. v = 15.23 ft/s


A ball having a mass of 2 kg slides without friction within a vertical circular slot. If it is released from rest when  = 10°, determine the force it exerts on the slot when it arrives at points A and B.

A. NA = 38.6 N, NB = 96.6 N
B. NA = 30.9 N, NB = 61.8 N
C. NA = 30.9 N, NB = 81.2 N
D. NA = 38.6 N, NB = 77.3 N

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