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April 18, 2014

Homework Help: pop

Posted by Anonymous on Sunday, February 19, 2012 at 3:58pm.

If superman in space throws a boulder with 10 times as much mass as himself, and the boulder leaves his hands at 100 m/s, how fast does superman recoil?

A) 1000 m/s.
B) The same speed, 100 m/s.
C) 10 m/s.
D) None of these are correct.

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