The free-fall acceleration on the surface of the Moon is
Chapter 13, Problem 12(choose chapter or problem)
The free-fall acceleration on the surface of the Moon is about one-sixth that on the surface of the Earth. The radius of the Moon is about 0.250RE (RE 5 Earths radius 5 6.37 3 106 m). Find the ratio of their average densities, rMoon/rEarth.
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