P10 Force and motion

Question 1

What is the name given to the distance a vehicle travels to safely come to a stop after the driver has spotted a hazard?

Answer 1

stopping distance

Question 2

What is thinking distance?

Answer 2

the distance vehicle travels during driver’s reaction time

Question 3

What is braking distance?

Answer 3

the distance vehicle travels once brakes have been applied

Question 4

What is the relationship between stopping distance, thinking distance, and braking distance?

Answer 4

stopping distance = thinking distance + braking distance

Question 5

Does the speed of a vehicle have a bigger effect on braking distance or thinking distance?

Answer 5

braking distance

Question 6

Which distance is proportional to the speed of the vehicle?

Answer 6

thinking distance

Question 7

What are three factors that can affect the braking distance of a vehicle?

Answer 7

speed, road conditions, condition of tyres and brakes

Question 8

What can happen if the braking force used to stop a vehicle is very large?

Answer 8

brakes may overheat / the car may skid

Question 9

What is elastic deformation?

Answer 9

an object can go back to its original shape and size when deforming forces are removed

Question 10

What is inelastic deformation?

Answer 10

an object does not go back to its original shape and size when deforming forces are removed

Question 11

How do you find the spring constant from a force-extension graph of a spring?

Answer 11

find the gradient of the straight line section