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__This is the example:__

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/s^2 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?

__The professor's answer is:__

The speed is 3.10 m/s.

Thank you in advance for taking the time to help me!

--Dan