Physics

I'm having trouble setting up/solving this physics problem? Can someone please help me? Thank you.

A 4700 kg lunar lander is in orbit 45 km above the surface of the moon. It needs to move out to a 340-km-high orbit in order to link up with the mother ship that will take the astronauts home. How much work must the thrusters do?

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  1. change PE= min work
    min work= GMm/r1-GMm/R2

    M mass of moon, m is mass of lunar

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    bobpursley

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