If you carry a U. S penny (weighing 0.025 N) to the top of the Empire state building (449m) how much work have you done to the penny?

Question

Physics

Chapman

30 November, 02:50

If you carry a U. S penny (weighing 0.025 N) to the top of the Empire state building (449m) how much work have you done to the penny?

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Answers (1)

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Kael Wolf · Answer 1

The work you have done on the penny is the amount of gravitational potential energy it has when it reaches the top.

Gravitational PE = (weight) x (height)

= (0.025 N) x (449 m)

= 11.225 joules.

That's about the same amount of work it takes to carry

one pound of butter to the top of an 8.5-foot ladder.