For finding change in gravitational potential energy we assume one particle at rest and then find the work done by it on the moving particle. But then how do we calculate the work done when both of them are moving and approaching each other.
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When two or more bodies interact with each other, some work has to be done in assembling them together in their respective places.
Total work done in assembling bodies together, in their respective places, is called gravitational potential energy of the system.
Potential energy of a system of two masses is defined as the amount of work done in bringing these two masses from infinity to their respective places.
Total work done in assembling bodies together, in their respective places, is called gravitational potential energy of the system.
Potential energy of a system of two masses is defined as the amount of work done in bringing these two masses from infinity to their respective places.
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