Drivers Ed Chapter 5

Traction

Friction created by the tire on the road

Reaction

length of time it takes to execute your action

Perception time

length of time you take to identify, predict, and decide to slow for a hazard.

on an downhill road your braking distance will be _____

longer

Does a car want a lower of higher center of gravity?

lower;more stable

When you drive on an underinflated tire, only the _____ of the tire will give traction. It's also likely to _____ up easier

outside edges, heat

If tire has too much pressure, only _____ of tire will have traction

center

acitve Restraint device

device you engage (seatbelt)

total stopping distance

distance your car travels while you make a stop.

Braking distance

distance your vehicle travels from the time you apply the brake until you fully stop.

a trucks energy of motion ___ by load. When a struck weighs ___as much, it needs about ____ the distance to stop.

doubles, twice, twice

Energy of motion

energy it takes for a vehicle to move

Force of impact

force in which a moving object hit another object

Good shock absorbers vs bad ones

good: maintain traction bad: tires bounce off the road

Tread

grooved surface of a tire that grips the road

passive Restraint device

part that works automatically (airbag)

How to check traction on icy roads?

1. check road behind you 2. if clear, brake vehicle a little to see how breaking responds to the road 3. if you don't break, reduce speed even further

Three types of collisions for when you hit a solid object

1. vehicle hits object and stops 2. occupants either hit inside of vehicle or restraint devices 3. occupants may suffer internal collisions as their organs impact with the inside of their body

As the driver, you chest should be ___ inches form the steering wheel

10

Airbags deploy speeds over _____ mph

200

If your are travelling at 63 mph it will take you at least ____ feet to stop

300

If you accelerate from 20 mph to 40 mph, your braking distance will be about ___ times longer.

4

If you cut speed in half, force pushing you off the road will be cut ______ times

4

When the truck's speed doubles needs about ____ times distance to stop. If your triple speed you will need _____ times distance to stop.

4, 9

To avoid airbag injury, keeps your hands between __ and ____ oclock and _____ and ____ oclock position

9 and 3 8 and 4

how does gravity affect your driving

If you are driving a small vehicle, you will have more control over it rather than if you were driving a larger vehicle

What happens when you drive uphill n a regular vehicle, as well as a stick shift vehicle

Regular: increase vehicles power Stick shift: use low gear to increase power and maintain speed

4 factors that can affect your car on a curve

Speed, sharpness of curve, banked curve and load of car.

Banked curve

a curve higher on the outside than it is on the inside.

What does a tires tread do in water

allows water to flow through the grooves and away from the tire, allows tire tread to cut through the water and grip to the road.

Restraint device

any part of vehicle that holds an occupant in a crash

In a split traction situation, you must divide the amount of _____ between ______ or ______ and _______.

available traction, stopping, starting, turning

THREE things you have to do when stopping a vehicle

perceive hazard in path of travel, react, break car to stop.

center of gravity

point of which around an objects weight is evenly distributed

How to check your tire pressure?

put a penny in the tire, if your can see all of lincoln's head then you know to switch the tire.

on an uphill road your braking distance will be _____

shortened

factors that affect breaking distance

speed, vehicle condition, roadway surface, driver ability, antilock breaking system, hills, loads

Three factors determining how hard something will hit another object

speed, weight, distance between impact and stopping

truck's energy of motion will change in proportion to the ____ of its change in speed

square

friction

the force that keeps each tire from sliding on the road

Blowout

when a tire in punctured and all of the air is let out at once