For the given system shown, block A has a mass of 7 kg and the inclined plane is smooth. It is released from rest in the position shown. Consider the pulleys to be weightless and frictionless. (a) Determine the direction of motion of the block (b) Find the acceleration of the block (c) If the incline plane is rough and the coefficient of kinetic friction between the incline and the block is 0.20, what is the acceleration of the block when released from rest? (Note: The downward force on the pulley is 140N) 12 m 30° 15

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