A 40 kg block runs on smooth horizontal rails on the top of a cliff. The...

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A 40 kg block runs on smooth horizontal rails on the top of a cliff. The block is attached to a light inextensible rope, which runs horizontally to a pulley on the edge of the cliff. The other end of the rope hangs vertically, and is attached to another block of mass m kg. (a) Suppose the block accelerates at 6 m/s. What is the value of m? (b) Suppose that m = 10 kg, and that the first block is on rough ground (instead of smooth rails), with a coefficient of friction of = 0.2. What is the tension in the rope and the acceleration of the hanging block? A 40 kg block runs on smooth horizontal rails on the top of a cliff. The block is attached to a light inextensible rope, which runs horizontally to a pulley on the edge of the cliff. The other end of the rope hangs vertically, and is attached to another block of mass m kg. (a) Suppose the block accelerates at 6 m/s. What is the value of m? (b) Suppose that m = 10 kg, and that the first block is on rough ground (instead of smooth rails), with a coefficient of friction of = 0.2. What is the tension in the rope and the acceleration of the hanging block?