Answer to Question #285671 in Physics for zxc

Question #285671

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?

Expert's answer

The velocity is

"E=\\dfrac12mv^2,\\\\\\space\\\\\nv=\\sqrt{2E\/m}=126\\text{ J}."

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