# Shared Flashcard Set

## Details

Chapter 5-Natural Laws and Car Control
5.1-Gravity and Energy of Motion 5.2-Friction and traction 5.3-Stopping distance 5.4-Controlling Force of Impact
21
Driving Skills
10/13/2009

Term
 friction
Definition
 force that keeps each tire from sliding on the road
Term
 traction
Definition
 friction or gripping power between the tires and the roadway surface
Term
Definition
 grooved surface of a tire that grips the road
Term
 blowout
Definition
 sudden loss of tire air pressure while driving
Term
 total stopping distance
Definition
 distance your car travels while you make a stop
Term
 perception distance
Definition
 distance your vehicle travels during perception time
Term
 braking distance
Definition
 distance your vehicle travels  from the time you apply the brake until your vehicle stops
Term
 force of impact
Definition
 force with which a moving object hits another object
Term
 speed
Definition
 most important factor in determining how hard a vehicle will hit another object
Term
 weight
Definition
 the heavier vehicle, the more damage it will cause in a collision
Term
 restraint devices
Definition
 any part of the vehicle that holds an occupant in the seat during a collision
Term
 passive restraint devices
Definition
 restraint devices, such as an air bag or an automatic seat belt, that works automatically
Term
 active restraint devices
Definition
 restraint devices that you have to engage
Term
 gravity
Definition
 the force that pulls all things to the earth
Term
 center of gravity
Definition
 the point around which an object's weight is evenly distributed
Term
 energy of motion
Definition
 kinetic energy or the energy an object has because it is moving
Term
 5.1-Gravity and Energy of Motion
Definition
 -Gravity: increase your speed when driving up a hill to keep the same speed; brake earlier when going down a hill because gravity pulls you down quicker -Energy of Motion: factors that affect energy of motion are weight of the moving object, speed--energy of motion will change in proportion to the square of its change in speed
Term
 5.2-Friction and Traction
Definition
 -Friction -Traction:helps vehicle grip the road so you can change speed and direction, 3 things that can reduce traction are underinflation, overinflation, and -use these steps to check how much traction you have: 1. check your rear zone to make sure no traffic is near 2. Brake gently to see how your vehicle responds 3. If your vehicle does not slow or if your antilock brakes start to work, reduce speed even further -factors that affect your car in a curve
Term
 5.3-Stopping Distance
Definition
 -to help compensate for your long preception time, aim high and look 12 seconds or more down the road -4 factors that affect braking distance: speed, vehicle condition, roadway surface, driver ability, antilock braking system (ABS), hills, and loads -use the 4 second rule, which enables you to project your approximate stopping distance under ideal conditions at any speed -3 parts that add up to your total stopping distance: perception distance, reaction distance, braking distance -how you can estimate your stopping distance: use 4 second rule
Term
 5.4- Controlling Force of Impact
Definition
 -3 factors that will change your vehicle's force of impact in a collision: speed, weight, and distance between impact and stopping -the correct way to adjust safety belts: 1. adjust seats 2. snap metal fitting on end of safety belt 3. adjust shoulder part of safety belt across chest. -how drivers and passengers should position themselves to benefit from air bags: wear w/ safety belts, driver: keep hands between 9 and 3 and 8 and 4 position, driver: steering wheel should be 10 inches away from chest, tilt steering wheel so it will deployed to your chest, children in child seats and young people up to the age of 12 must sit in the pack seats. -position child safety seats in the back seat
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