A wrecking ball attached to the end of a long, essentially massless chain is rel

Question

A wrecking ball attached to the end of a long, essentially massless chain is released from rest, from a height H = 5 meters off the ground, as shown in figure 1. At the lowest point of its swing, it collides with a piece of modern sculpture. Since the sculpture is made of wet clay, it sticks to the wrecking ball. The wrecking ball has mass 200 kg. The sculpture has mass 100 kg. Mechanical energy is the sum of potential and kinetic energy. The ball keeps speeding up, but at a slower and slower rate of change. Near the top of its swing, the ball is

Explanation / Answer

B. positive, but less than 2000 N

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