Calculating the Gravitational Potential Energy

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Calculating the Gravitational Potential Energy

Postby JOtomo1F » Thu Oct 03, 2019 9:16 am

Hey everyone, I was reading through the fundamentals pages and got stuck with this problem. Can anyone help out? Thanks!

Self-test A.5A What is the gravitational potential energy of this book (mass 2.0 kg) when it is on a table of height 0.82 m,
relative to its potential energy when it is on the floor?

Sahil Jog 1F
Posts: 126
Joined: Thu Jul 11, 2019 12:16 am

Re: Calculating the Gravitational Potential Energy

Postby Sahil Jog 1F » Thu Oct 03, 2019 9:25 am

So since Gravitational potential energy equals mass * gravitational acceleration * relative height, The book on the table would have a GPE of (2.0kg)(9.8 m/s^2)(.82m) = 16 Joules. Since we set the table's height in accordance to the floor, the floor's height would be zero, and so the book on the floor would have 0 Joules of Gravitational potential energy.

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