Reaction time + practicals

Question 1

Stopping distance equation

Answer 1

stopping distance= thinking distance + braking distance

Question 2

Thinking distance

Answer 2

The distance a vehicle travels during the driver’s reaction time

Question 3

Braking distance

Answer 3

The distance a vehicle travels while the brakes are being applied

Question 4

Factors affecting thinking distance

Answer 4

Alcohol and drug consumption, age, distractions and fatigue

Question 5

Factors affecting breaking distance

Answer 5

Quality of tyres, quality of brakes, weather conditions and road surface type

Question 6

Braking and energy

Answer 6

When a car is braking work is done against friction and energy is transferred from the kinetic store of the car to the thermal store of the surroundings

Question 7

Reaction time

Answer 7

The typical range of reaction time varies from 0.2s to 0.9s

Question 8

(Thinking) distance equation

Answer 8

s (distance in m)= v (velocity in m/s) x t (time in s)

Question 9

Independent variable

Answer 9

What the experimenter changes (the cause)

Question 10

Dependent variable

Answer 10

What changes when you alter the independent variable

Question 11

Control variable

Answer 11

Something you have to keep the same otherwise it would change the dependent variable

Question 12

Hazard

Answer 12

A situation or object that could cause harm

Question 13

Risk

Answer 13

How you might be harmed by a hazard

Question 14

Error in mean equation

Answer 14

(biggest result- smallest result) / 2

Question 15

Name of the type of error that causes results to be spread around the true value

Answer 15

Random error