Electrical and Gravitational Potential Energy Problems

Any matter lifted up from the surface of the earth will change its potential energy value. Do you remember what this type of energy is called? 

It is called gravitational potential energy. You may recall the formula PE= mgh. If you lift matter up against the force of gravity, you are doing work on it which increases its gravitational potential energy. When you let it back down, the gravitational potential energy decreases.

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