Question: A ball is held at a height H above a floor. It is then released and falls to the floor. If air resistance can be

A ball is held at a height H above a floor. It is then released and falls to the floor. If air resistance can be ignored, which of the five graphs below correctly gives the mechanical energy E of the Earth-ball system as a function of the altitude y of the ball?

H E H H E H IV

A) I

B) II

C) III

D) IV

E) V

H E H H E H IV

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