If a cyclist of mass 70kg uses a bicycle of mass 7kg, how much work must the cyclist do against gravity in order to ascend to 2100 m from sea level (0m)

Question

Rishi Fitzgerald

Physics

23 October, 10:07

If a cyclist of mass 70kg uses a bicycle of mass 7kg, how much work must the cyclist do against gravity in order to ascend to 2100 m from sea level (0m)

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Answers (1)

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Conner Hanson · Answer 1

Correct answer: W = 1,584,660 J = 1.58466 · 10⁶ J = 1.58466 MJ

Explanation:

Work is a measure of the change in potential energy in this case and the formula is W = Ep = m· g · h if we take g = 9.8 m/s²

W = 77 · 9.8 · 2,100 = 1,584,660 J = 1.58466 · 10⁶ J = 1.58466 MJ

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