inclined roof

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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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