MCQEasy1 mark
1
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A fast-moving cyclist stops pedalling on reaching a hilly track. If he continues to move with the acquired energy, then assuming no loss of energy: (a) his kinetic energy remains constant at all times. (b) his potential energy remains constant at all times. (c) his total mechanical energy continuously increases. (d) his total mechanical energy remains constant.
Topic: Conservation of mechanical energy
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Answer
Exam answer
(d) His total mechanical energy remains constant.
Explanation
With no energy loss, kinetic and potential energy interchange while their sum remains constant.
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