Mitch, in Question 13, has just returned from physics class where he was studying about...

Mitch, in Question 13, has just returned from physics class where he was studying about work. Mitch argues that, from his frame of reference, Gary applies a 600- newton force for a distance of 20 meters in 1 second and therefore does 12,000 joules of work on the block. He wonders why the block does not appear to speed up as a result of this work. What is the flaw in Mitch’s reasoning?

Reference of Question 13

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.