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September 21, 2014

September 21, 2014

Posted by **pinky** on Friday, September 23, 2011 at 12:01am.

- physics -
**Steve**, Friday, September 23, 2011 at 4:58pmJust get out your good old

v = at

s = 1/2 at^2

formulas and work with them a bit.

We want to find out how long it will take to go 245m under acceleration.

245 = 7t + .4t^2

t = 17.5 sec

v = 7 + .8*17.5 = 21.0 m/s

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