Posted by Lucas on Friday, March 25, 2011 at 3:39pm.
A car slows down from 18 m/s to rest in a distance of 91 m. What was its acceleration, assumed constant?

AP Physics  Henry, Sunday, March 27, 2011 at 5:43pm
(Vf)^2 = Vo^2 + 2ad = 0,
(18)^2 + 2a*91 = 0,
324 + 182a = 0,
182a = 324,
a = 1.78m/s^2.

AP Physics  Anonymous, Thursday, September 27, 2012 at 12:22pm
In coming to a stop, a car leaves skid marks 93 m long on the highway. Assuming a deceleration of 7.50 m/s2, estimate the speed of the car just before braking.
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