Chapter 3
inerta
an object in motion will stay in motion until acted up by an outside force vice versa
_____ roadways improve your traction in turns, they help overcome the centrifugal force
banked
the tendency for objects to be pulled outward when rotating around a center
centrifugal
what is caused by the contact of one surface on another. It results in the resistance of an object moving over a surface.
friction
in an unavoidable crash you should head towards (a) bushes rather than trees, (b) snow, (c) soft dirt and (d) sand barrels placed in front of freeway abutments, why?
it will reduce the force on the car over a greater distance
Road surface changes due to (a) ice, (b) rain, (c) snow, (d) oil and diesel fuel buildup, or (e) sand or dirt will reduce the traction of your tires. which can result in:
losing control of your vehicle
weight helps to stop a vehicle by:
making more friction between the tires and road surface
the force of a moving object
momentum
To keep your vehicle from rolling away, you should leave your vehicle in a low gear, or in "_____" if it has an automatic transmission
park
what is caused by the friction of your brakes being stronger than the friction force between your tires and the road, which causes you to lose traction
skidding while braking
In order to keep a vehicle in a turn without allowing centrifugal force to pull the car out, you should:
slow down before the curve, brake gradually while turning and down shift
The forces that stop your car during a crash will be greatest if you have a head-on collision with another vehicle or large immovable object because:
the momentum needs to be absorbed almost instantaneously
two cars in a head-on collision at the same speed. which car will take the greater impact?
the one that weights less
what is the purpose of anti-lock brakes
to stop you wheels from locking during a quick stop
when parking downhill which way do you turn your wheels?
toward the curb
when you park uphill without a curb which way do you turn you wheels?
toward the side of the road
when parking uphill with a curb which way do you turn your wheels?
toward the street
the result of friction between the road and your tires, caused by the weight of the car pushing the tires to the road, due to gravity
traction
There is also potential energy built up in the components of your car's suspension system that may cause you to swerve when you come out of a ______
turn
what do you do just in case your parking brakes fail on a up or down hill?
turn your wheels so that it will not roll into traffic
to avoid wearing your break and clutch do not ride your brakes, do not drive with your clutch partially engaged, and ___________
use your lower gears to slow the vehicle on downhill grades
momentum of an object is proportional to its:
weight, speed
when you get hit from behind and your head stays still while your body moves forward
whiplash
_____ or _____ tires will reduce the friction between your tires and the road surface, reducing the traction needed to (a) start smoothly, (b) stop quickly, and (c) pull out of a turn or curve without losing control.
worn, over-inflated