Why a spacecraft consume more fuel in going from earth to moon than it does on the return trip ?

A spacecraft consume more fuel in going from earth to moon than it does on the return trip. Comment on this.

Ans.     In going from earth to moon, the spacecraft has to do more work against the greater gravitational attraction of the earth. For the return journey, moon’s gravitational force is much less, hence less work is done and less fuel is consumed.

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