Question1
Assume we added some constant to the total energy of the system. For instance, say that instead of the potential energy being 0 Joules when masses are on the ground, we set it to be 5 Joules. In other words, what happens to each of the results in the table as to add 5 J to the potential energies?
Question2
The driver of a car slams on the brakes as she sees a tree blocking the road. The car slows uniformly with a magnitude of acceleration equivalent to 5.60 m/s2 for 4.20 s, making straight skid marks 62.4 m long, all the way to the tree. With what speed does car after that strike the tree?