1. 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 4.20s making skid marks 62.4m long that end at the tree. With what speed does the truck strike the tree? 2. Relevant equations I'm guessing that I have to use Vf2-Vo2=2as? I'm really not sure... I've been staring at this problem for hours, is It a trick question? Does it even hit the tree?