Billy and Susan just received toy cars from their grandparents. Billy's
car was a sports-car model and Susan's was a box car model. Whose car
will run fastest downhill?
What is known:
- Each car body weighs 10 lb.
- The wheels on both cars weigh 1 lb each.
- The cars are rolled down a 13.7 ft hill.
- The sports car comes with rim wheels that have nearly all of the wheel's
mass at the rim.
- The box car comes with wheels that are uniform disks, with the mass
evenly distributed throughout.