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The driver of a truck slams on the brakes when he sees a tree blocking the road. The truck slows down uniformly with an acceleration

The driver of a truck slams on the brakes when he sees a tree blocking the road. The truck slows down uniformly with an acceleration of -6.5 m/s2 for 2 s, making skid marks 44.5 m long that end at the tree. With what speed does the truck then strike the tree?

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