| A | B |
|---|
| acceleration | increase in speed |
| adhesion | traction or friction |
| antilock brake system | designed to keep a car's wheels from locking |
| banked curve | curve that slopes from the inside edge |
| crowned road | road that is higher in the center than at either edge |
| decelerate | lower your speed |
| blowout skid | caused by sudden loss of air in tire |
| braking skid | caused when brakes area applied too hard and wheels lock |
| cornering skid | skid on a curve |
| power skid | caused when accelerator is applied too quickly |
| skid | driver's loss of control over direction in which vehicle moves |
| gravity | invisible force that pulls all objects on earth toward center |
| center of gravity | point around which all weight of an object is evenly distributed |
| traction | friction between tires and road surface |
| directional control | ability of a vehicle to hold to a straight line |
| inertia | tendency of an object in motion to stay in motion and an object at rest to stay at rest |
| kinetic energy | energy in motion |
| momentum | product of weight and speed |
| force of impact | force with which a moving vehicle hits another object |
| friction | resistance to motion to two objects when they touch |
| reaction distances | distance a vehicle moves after identifying until brakes are applied |
| braking distance | distance a vehicle moves from the time yu apply the brakes until the vehicle stops |
| perception distance | distance a vehicle moves from moment of identification |
| total stopping distance | perception, reaction and braking distance |
| If outer edges of tires grip road | tire is underinflated |
| If center of tires only grip roads | tire is overinflated |
| How far should you sit from airbag deployment | 10 - 12 inches |
| children are best protected when sitting where | center of back seat |
| how long does it take for air bags to inflate and deflate | less than a second |
| seat beltshelp by... | countering inertia |
| moth effect | phenomenon where cars follow lights of trucks |
| looming effect | phenomenon where large objects appear slower than they really are |
| force | mass x acceleration |
| impulse | force x time interval |
| momentum | weight x speed |
| formula for kinetic energy | K-1/2 mv squared |
| Newton's First Law | an object at rest will stay at rest until a force acts upon it |
| Newton's Second Law | If you want to accelerate something you must apply force |
| increasing impact time | decreases impact force and injuries |
| centrifugal force | farce that tends to push a moving object out of a curve and into a straight path |
