a ball is held at a height H above the floor .it is then released and falls to the floor. if a 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?
Answer is 5 , but explain how?
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Explanation:
no energy is used in this work because no resistance and it is spontaneous process bro. so no change in mechanical energy
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