I’m once again teaching a First Year Seminar class at UC Davis on High Performance Driving. I just gave them a homework problem, so I thought I bring some of that here too. The lesson was about grip, so let’s start with the laws of friction.
Laws of Friction
- Amontons’ First Law: The force of friction is directly proportional to the applied load.
- Amontons’ Second Law: The force of friction is independent of the apparent area of contact.
- Coulomb’s Law of Friction: Kinetic friction is independent of the sliding velocity.
- Two identical cars are traveling 60 mph. Car A has just the driver. Car B has 3 additional passengers. Which car stops first?
- Two identical cars are traveling 60 mph. Car A has 195 width tires. Car B has 205 width tires. Which car stops first?
- Two identical cars are slowing down from speed by stomping on their brakes. Car A is going 60 mph. Car B is going 100 mph. Which driver feels more G-force?
- Why do racecars have slick tires?