Forces and Braking

Question 1

what is the stopping distance equation?

Answer 1

stopping distance = thinking distance + braking distance (the total distance a cartravels b4 it stops)

Question 2

what is the thinking distance? ( basically stopping distance part 1)

Answer 2

the distance a vehicle travels in the time it takes for the driver to apply the brakes after realising they need to stop

Question 3

what is the braking distance?( basically stopping distance part 2)

Answer 3

the distance a vehicle travels in the time after the driver has applied the brake

Question 4

what does the braking force needed to stop a vehicle in a given distance depend on? (name 2 things)

Answer 4

the speed of the vehicle when brakes are first applied, the mass of the vehicle

Question 5

between what values does a person’s reaction time vary?

Answer 5

0.2s and 0.9s

Question 6

what can a reaction time be affected by? (4 things)

Answer 6

tiredness, drugs, alcohol, distractions

Question 7

how do longer reaction times change the thinking distance when stopping for a given speed?

Answer 7

they increase the thinking distance

Question 8

how can the braking distance of a vehicle be affected? (name 2 things)

Answer 8

poor road and weather conditions, such as wet or icy roads, poor vehicle conditions, such as worn brakes or worn tyres

Question 9

is thinking distance proportional or inversly proportional to speed?

Answer 9

proportional to speed

Question 10

does breaking distance increase as speed increases?

Answer 10

yes, but by a greater rate for higher speeds

Question 11

in the GIVEN stopping distance equations, what does a, v, u and s stand for?

Answer 11

a= decelleration
v= final speed (which is 0 as the car stops)
u= start speed
s= braking distance