A book was dropped from a height of 4.2 meters has 109 joules of potential energy. What is the mass of the book? (I have 6 more problems so please stick around to help if you can!)

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asked Feb 9, 2022 51.7k views

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A book was dropped from a height of 4.2 meters has 109 joules of potential energy. What is the mass of the book?

(I have 6 more problems so please stick around to help if you can!)

Physics
high-school

Karim Tarek asked

by Karim Tarek

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Answer:

$P.E=mgh \\ 109 = m(9.81)(4.2) \\ m = (109)/(9.81 * 4.2) \\ \boxed{m = 2.6455 \: kg}$

Ggarber answered Feb 14, 2022

by Ggarber

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