How much work is done by the Moon's gravitational field as a 1005 kg meteor comes in from outer space and impacts on the Moon's surface?

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1 answer

mMG/R

where R = moon radius
G = universal constant of gravity
M = Moon's mass
m = 1005 kg

You will need to look up G, M and R and do the calculation.

The number you get will probably be small compared to the kinetic energy of the meteor before entering the moon's gravitational field.