Answer to Question #287805 in Physics for Francis De Honor

Question #287805

A coin is placed at the top of a two-story building, having a potential energy of 20 J. If it has a mass of 2.50 grams, what would be its velocity upon hitting the ground?


1
Expert's answer
2022-01-16T13:11:17-0500

The velocity just before hitting the ground can be found from conservation of energy:


"E=\\dfrac12mv^2\u2192v=\\sqrt{2E\/m}=126\\text{ m\/s}."


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