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March 4, 2015

March 4, 2015

Posted by **J** on Tuesday, February 15, 2011 at 2:28am.

- Physics -
**bobpursley**, Tuesday, February 15, 2011 at 8:51amyou know the initialPE, and the final PE is not known

intial=final

55*g*12=(55+21)g*h

solve for h.

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