The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration of -5.50 m/s2 for 4.35 s, making straight skid marks 63.0 m long, all the way to the tree. With what speed does the car then strike the tree?
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Expert's answer
2012-09-25T11:02:52-0400
The car decelerates by
V = -5.50[m/s²]*4.35[s] = -23.925 m/s.
Let's find the initial speed V0 of a car. We know that
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