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23 February, 21:07

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of - 5.60 m/s2 for 4.20 s, making straight skid marks 62.4 m long ending at the tree. With what speed does the car then strike the tree

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  1. 23 February, 22:46
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    The equation for speed is s=d:t the distance=62.4m and the time=4.20s so 62.4:4.20 = 14.857
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