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08-27-2008, 04:42 PM
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| Help with a Physics question.?
I tried a hundred times and cant figure out how to do this problem without initial velocity. The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration -5.40 m/s2 for 4.30 s, making straight skid marks 62.5 m long ending at the tree. With what speed does the car then strike the tree?
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