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January 25, 2015

January 25, 2015

Posted by **Jessica** on Friday, September 7, 2007 at 2:02am.

- physics -
**bobpursley**, Friday, September 7, 2007 at 5:24amThe closing distance has to be zero.

The distance you have to run is 100 m more than the train goes in the time to catch it.

dyou= 100 + 7t

dtrain= 1/2 .2 t^2

set them equal, solve for t.

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