Gary is riding on a flatbed railway car, which is moving along a straight track at a con...

Gary is riding on a flatbed railway car, which is moving along a straight track at a constant 20 meters per second. Applying a 600-newton force, Gary is trying in vain to push a large block toward the front of the car. His two friends, Cindy and Mitch, are watching from beside the track. Would Gary and Cindy agree on the value of the block’s kinetic energy at the instant Gary passes his friends? Would they agree on the change in the block’s kinetic energy in the next second? Explain.