A 3-kg block has a speed of v=9 m/s at point O as it travels along a rough incline OA with μk=0.25. It then hits a spring with k=500 N/m at point A and eventually comes to a temporary stop as it reaches its highest point. Let x be the deformation of the spring when the block reaches a temporary stop.Which of the forces acting on the block does NOT do work? a. force exerted by spring b. normal force c. frictional force d. weight of the block

A 3-kg block has a speed of v=9 m/s at point O as it travels along a rough incline OA with μk=0.25. It then hits a spring with k=500 N/m at point A and eventually comes to a temporary stop as it reaches its highest point. Let x be the deformation of the spring when the block reaches a temporary stop.Which of the forces acting on the block does NOT do work? a. force exerted by spring b. normal force c. frictional force d. weight of the block

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