Final II

Good morning. After yesterday's conversation, I decided to lower the ante. I have cut the final in half.

I chose the easier problem in each pair. These are very easy.

Problem 7 should read:

A 1500 kg car traveling at 10 m/s suddenly runs out of gas while approaching the valley shown in the figure below. The alert driver immediately puts the car in neutral so that it will roll. What will be the car’s speed as it coasts into the gas station on the other side of the valley? Ignore rolling friction.