1.how does inertia affect a person who is not wearing a seatbelt during a collision?
2.how does kinetic energy affect the stopping distance of a vehicle traveling at 30 mph compared to the same vehicle traveling at 60 mph?
3.how does kinetic energy affect the stopping distance of a small vehicle compared to a large vehicle?
4.keeping in mind the kinetic energy of a moving vehicle, how can a driver best prepare to enter sharp curves in the roadway?
5.using information about natural laws, explain why some car crashes produce minor injuries and others produce catastrophic injuries.

Inertia is the tendency of an object to stay in motion when it is in motion. This is basically Newton's first law. The person in the car is still in motion when the car crashes and If there's no seatbelt to increase the time of the crash then there will be a larger force. 2. A car traveling at a higher rate of speed will have more kinetic energy than if it were to be traveling at a lower speed. The formula for kinetic energy is (1/2)* mass* velocity^2. Therefore doubling the velocity will affect it by a factor of 4. (4x greater). 3. A driver can slow down before entering the curve as a smaller tangent velocity will affect the centripetal force less. 4. Force= mass* acceleration so if a car has a higher acceleration then there will be a greater force of impact. And this also goes back to question 1 with the seatbelts.