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December 19, 2014

December 19, 2014

Posted by **Angie** on Monday, August 25, 2008 at 10:41pm.

_ How far are you from the intersection when you begin to apply the brakes?

_ What acceleration will bring you to rest right at the intersection

_ How long does it take you to stop after the light changes.?

- Physics -
**Fredr**, Tuesday, August 26, 2008 at 12:06amv0 = 20m/s

D = dist from int. = 110 - v0 x 0.50

t0 = time to stop

final velocity must equal zero...

0 = v0 - a x t0

t0 = v0/a

D = v0 x t0 - a x t0^2/2

substitute for t0...

D = v0^2/a - a x (v0/a)^2/2

solve for a...

- Physics -
**bobby**, Saturday, September 18, 2010 at 7:08pmThank you

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