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