Define gravity, energy of motion, kinetic energy and inertia.
gravity- force that pulls you to center of the earth energy of motion- object moves and acquires energy, the faster the car the more kinetic energy kinetic energy- same as energy of motion inertia- in proportion to speed squared
A vehicles speed when going downhill does what?
Energy of motion is another way of explaining what?
Because of energy of motion, when a vehicle's speed doubles, the vehicle needs how much stopping distance?
4 times the distance
The gripping action that keeps a tire from slipping on the roadway is what?