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December 17, 2014

December 17, 2014

Posted by **jo** on Sunday, July 1, 2012 at 2:46am.

- science -
**Damon**, Sunday, July 1, 2012 at 4:29amvertical problem

how long to fall 490 meters?

490 = (1/2)(9.81) t^2 solve for t

horizontal problem, same t

u t = 200

u = 200/t

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