Question: 4. A 3-kg block is released from rest from the top of an inclined plane. The inclined plane is 2 m long and makes an

4. A 3-kg block is released from rest from the top of an inclined plane. The inclined plane is 2 m long and makes an angle of 40 with the horizontal axis. The friction between the inclined plane and the block is 3 N. 2 m A 40 B (a) Calculate the change in gravitational potential energy when the block moves from the top of the inclined plane (point A) to the bottom of the inclined plane (point B). (5 marks) (b) Calculate the speed of the block when it reaches point B. (10 marks) (c) What should be the minimum friction between the block and the inclined plane for the block to stay at point A

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