Question

Blocks A and B shown below have a mass of 160 kg and 100 kg, respectively. Block B is released from rest in the position shown in the figure to pull block A up the 30° ramp. Block B is located 20m above the ground at C. If the masses of the pulleys and the cord are neglected,

(a) determine the velocity of block A when block B hits the ground at C. The coefficient of kinetic friction between block A and the ramp is 0.5 (10 marks)

(b) determine the minimum weight of block B to ensure that block B hits the ground at C. The coefficient of kinetic friction between block A and the ramp is 0.5 (10 marks)

Answer 1

Answer:

A block is placed on a rough surface inclined at The block is propelled and launched at a speed of down the incline and comes to rest after sliding (a) Draw the free-body diagram of the block while it is sliding. Also indicate your coordinate system axes. (b) Starting with Newton's second law applied along both axes of your coordinate system, use your free-body diagram to generate two equations. (c) Solve these equations for the coefficient of kinetic friction between the block and the incline surface. [Hint: You will need to first determine the block's acceleration.]

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