C6 - Forces Vehiclees and safety

Question 1

what 2 components make up stopping distance

Answer 1

thinking distance and breaking distance (breaking distance proportional to square of the speed of car)

Question 2

what affects thinking distance

Answer 2

alchohol
drugs
age

Question 3

what affects breaking distance

Answer 3

mass of car
conditions on the road
worn tyres or breaks
tread on tyres
speed

Question 4

what is apasenger cell

Answer 4

rigid box more likely to survive an impact

Question 5

what is a crumple zone

Answer 5

at front of car it will squash in a crash which absorbs a lot of the energy

Question 6

how do seat belts reduce force impact

Answer 6

stretchy so time of crash increses

Question 7

his can we use F=ma to explain how car safety features protect passengers

Answer 7

by increasing the length of the crash we are reducing the acceleration so the overall impact force will be reduced

Question 8

How can GPS track location

Answer 8

3 safelights send out regular beams of informations. recover receives signals and can work out how long it tok to receive so how far it was from it, signal has precise ordinates and if you draw circle of correct distance form these 3 starlight where they overlap is where you are.
this is known as trilateration