physics

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Deimos, a moon of Mars, is about 12 km in diameter, with a mass of 2.0x10^15kg. Suppose you are stranded alone on Deimos and want to play a one-person game of baseball. You would be the pitcher, and you would be the batter! With what speed would you have to throw a baseball so that it would go into orbit and return to you so you could hit it?

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    4.72m/s

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