chapter 5 mod 7

gravity

pulls object toward the center of the earth

friction

force that keep tires from slipping on the road

energy of motion

kinetic energy

when a vehicle speed doubles it takes ____ the distance to stop

4 times

when it takes triples it takes ___

9 times

Tire tread

allow water to flow through the groves to help prevent hydroplaning

total stopping distance consist of

perception reaction braking distance

4 second rule is an estimate of how long it will take to come to a ____

stop

force of impact

distance the car travel after an impact occurs is vip. difference between hitting a tree or a hedge

large vehicles have a slow stopping ability because of their weight

collision

when a moving object hits something the most important factor in determining how hard it hits is the distance traveled after impact. quicker the stop- the greater the impact

second collision occurs inside the car after the collision

a car driven around a curve tends to go in a___

straight line

2nd collision the occupants hitting the inside of the car. either a seat belt or a dash, windshield, or steering wheel stops them

motorcycles

4% of the driving population but involved in 10% of all traffic deaths

most accidents involving a motorcycle are the result of the car not seeing the motorcycle

2 ways for the motorcycle to be seen better

drive on the left side of their lane lights on during the day

helmet vip to protect a cyclist form head injuries

when being tailgated by a cyclist

increase your following distance of the vehicle ahead

4 second following distance when following a semi-truck

1.decreased visibility because of their size 2.the truck needs a farther stopping distance

Rain

pedestrians do not pay as much attention to the traffic

bicyclist

try to predict every possible action that they may make

emergency siren

safely move out of the way and stop

never attempt to start a car that has a frozen battery. the battery could explode

cooling

-radiator -thermostat

Lubrication

oil pump

engine/power train

transmission drive shaft differential

engine oil reduces friction among moving parts of the engine

preventive maintenance

care that a car receives to prevent trouble later on

defect in exhaust system can cause carbon monoxide poisoning

thermostat controls flow of coolant to cool engine

never remove the radiator cap of a hot car because boiling coolant may burn you