A student drops a feather and a bowling ball from equal heights in a vacuum. The objects land at the same time. Wich graph correctly shows the bowling balls total mechanical energy as it falls

Answer 1

The correct graph would show a constant horizontal line, since the mechanical energy of the bowling ball remains constant as it falls. There is no air resistance in a vacuum to slow down the ball, so its potential energy decreases while its kinetic energy increases. The total mechanical energy, which is the sum of potential and kinetic energy, remains constant.