A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of

Question

Quizplus · Accepted Answer

According to the law of conservation of energy, total mechanical energy remains conserved in the absence of non-conservative forces like air resistance. In this case, as air resistance is negligible, the only force acting on the melon is the gravity, which is a conservative force. Therefore, the initial kinetic energy of 100 J will convert entirely to potential energy at the highest point of the toss, and when the melon returns to its initial level, it will again have a kinetic energy of 100 J as the potential energy converts back to kinetic energy. Hence, the correct answer is C) 100 J.

A Melon Is Tossed Straight Upward with 100 J of Kinetic