Speaking of the moon; what is the gravitational force necessary to keep the moon in orbit around the earth in the first place? The moon has a mass of 7.349 x 10^22 kg. Its mean distance from the earth is 384,000 km. It completes one revolution in 27 days, 7 hrs, and 43 min.
Using your figures, 2 10
20N. That's by a 15 year old boy in less then 3 minutes. Is that's your idea of a physics challenge?
Edited by lyx2no, : Spelling and grammar.
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