Question: 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 -5.60 m/s2 for 4.20 s, making skid marks 62.4 m long that end at the tree. With what speed does the truck then strike the tree? Conclusion: equation: dx = vot + .5at^2 62.4 m = v (4.20s) + .5 (-5.60 m/s^2) (4.20s) v=26.6 m/s May you experts please check if this is correct? Thanks a bunch.