Driver's Ed chapter 9 studyguide
What rule is used to estimate your total stopping distance under ideal conditions?
4-second rule
Which statement best describes reaction time?
It averages 3/4 of a second.
In wet weather, with temperatures near the freezing point,
a bridge roadway freezes before a highway roadway.
A restraint that provides protection without having to be handled by the occupant is called
a passive restraint.
An example of an active restraint is
a safety belt.
When a vehicle's speed triples, how much more distance does it need to stop?
about nine times the distance
A vehicle going uphill works
against the force of gravity.
One purpose of the tread pattern on a tire is to
allow water to flow away from the tire.
Modern seat belts
are three-point lap and shoulder safety belts.
The center of gravity of a vehicle is that point
around which all weight is evenly balanced.
An air bag
automatically inflates to protect an occupant.
Air bags are designed to
be used with safety belts.
The best place to adjust speed to steer through a curve is
before entering the curve.
The distance a vehicle travels from the time the driver applies the brakes until the vehicle stops is
braking distance.
A small vehicle
can accelerate and stop more quickly than a large vehicle.
All states require that young children up to a certain age be protected by a
child safety seat.
A properly adjusted safety belt
fits snugly across the hips and comfortably across the chest.
Because of its energy of motion, when a vehicle's speed doubles, the vehicle needs about
four times the distance to stop.
What are the most important parts of the control system?
four tires
The force that keeps a tire from slipping on the roadway is called
friction.
A vehicle driven into a curve tends to
go in a straight line.
An important factor in maintaining traction is
good shock absorbers.
The force that pulls objects toward Earth is
gravity.
A rear-end collision involved a 20-year-old vehicle. The driver and front-seat passenger both sustained serious neck injuries. Which modern energy-absorbing device protects against such injuries?
head restraints
Good shock absorbers
help create traction.
Side door beams provide protection
in collisions when hit at an angle.
Child restraint seats must be used
in the back seat.
A vehicle's speed when going downhill tends to
increase.
Braking distance
increases as speed increases.
A banked curve
is higher on the outside than on the inside.
The higher the speed of your vehicle, the more
it will tend to go straight.
Energy of motion is another way of expressing
kinetic energy.
High energy of motion may cause a vehicle to
miss a tight curve.
If you drive through a curve at a speed higher than the posted speed, your vehicle
needs more traction to stay on the roadway.
If a tire is underinflated, the only part that grips the road well is the
outside edges of the tire tread.
If your tires wear out their center treads, they are
overinflated.
All-wheel drive means
power is supplied to four wheels.
The distance your vehicle travels while you respond to a road hazard is called
reaction distance.
A properly installed child safety seat is
required in all states for children up to a certain age.
Large vehicles, such as trucks and buses, have
slow stopping ability.
When a moving object hits something, what is the most important factor in determining how hard it hits?
speed
Three factors that determine force of impact are
speed, weight, and distance between impact and stopping.
When braking and turning, you use
split traction.
The second collision occurs when
the occupants hit the inside of the vehicle after a collision.
Which energy-absorbing feature protects the driver in a front-end collision?
the steering wheel and column
How many collisions occur when a vehicle hits a solid object?
three
Factors that affect traction include
tires, shock absorbers, and steering system.
When you slow for a turn, some traction is used to slow, and some is
used to turn.
The 4-second rule is an estimate of
your stopping distance.
Total stopping distance is the distance
your vehicle travels while you make a stop.