A 42-kg girl walks to the top of stairs that are 3.0-m high. How much gravitational potential energy does the girl gain?

P.E = 1234.8Joules

Explanation:

Given the following data;

Mass = 42kg

Distance = 3m

We know that acceleration due to gravity is equal to 9.8

To find the gravitational potential energy

P.E = mgh

P.E = 42*9.8*3

P.E = 1234.8Joules

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explanation:

its c its is a mixture of gases