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