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January 31, 2015

January 31, 2015

Posted by **Joseph** on Thursday, January 13, 2011 at 8:48am.

- Physics -
**drwls**, Thursday, January 13, 2011 at 11:37amLet initial speed = Vo

Average speed while decelerating = Vo/2

X = 100 m

Time to decelerate to zero =

T = 2 X/Vo

also,

T = Vo/a.

Therefore

2X/Vo = Vo/a

Vo = sqrt(2 a X) = 14.1 m/s

T = 14.1/1 = 14.1 s

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