The 5-kg block is moving downward at v1 = 2 m/s when it is 8 m from the sandy surface. Det...

The 5-kg block is moving downward at v1 = 2 m/s when it is 8 m from the sandy surface. Determine the impulse of the sand on the block necessary to stop its motion. Neglect the distance the block dents into the sand and assume the block does not rebound. Neglect the weight of the block during the impact with the sand.