Forces quiz

1. The speed of a car is a measure of how:

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1. far it is travelling.2. fast it is travelling.3. long it is travelling.4. high it is travelling.

2. A bus travelled a distance of 20 km in 2 hours. Its speed was:

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1. 0.1 km/h. 2. 40 km/h.3. 20 km/h.4. 10 km/h.

3. The mean speed of something is:

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1. its fastest speed.2. the total distance it

travels divided by the time taken.

3. its slowest speed.4. its speed limit.

4. If a car travels at 50 mph, how long will it take to travel 75 miles?

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1. 1.5 hours2. 0.5 hours3. 0.67 hours4. 67 minutes

5. Balanced forces:

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1. make objects speed up.2. make objects slow

down.3. do not change the

speed of moving objects.

4. only affect stationary objects.

6. This drawing shows two forces on a car. What will happen to the speed of

the car?

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1. It will accelerate.2. It will slow down.3. It will decelerate.4. It will stay the same.

7. What are forces X and Y?

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1. X is air resistance, Y is gravity.

2. X is air resistance, Y is friction.

3. X is gravity, Y is air resistance.

4. X is friction, Y is air resistance.

8. An object will accelerate quickly if it has:

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1. a large force and a small mass.2. a large force and a large mass.3. a small force and a large mass.4. a small force and a small mass.

Participant Scores8 John McParland8 Jamie Burrell8 Jesper Van Marle8 Luke Brett8 Willem Jan Vos

9. The air resistance of a car can be reduced by:

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1. making the car bigger.2. making the car heavier.3. giving it a streamlined

shape.4. putting a roof rack on it.

10. Which statement about air resistance is true?

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1. If speed increases, air resistance decreases.

2. If speed increases, air resistance increases.

3. If speed decreases, air resistance increases.

4. Speed has no effect on air resistance.

11. A car needs energy to keep movingbecause:

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1. everything needs a force to keep moving.

2. gravity is trying to slow it down.

3. it needs a force to balance friction and air resistance.

4. weight balances friction.

12. Air resistance on a moving object iscaused by:

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1. air being attracted to the object.

2. air particles moving around the object.

3. the wind.4. air particles hitting the

object.

13. There are changing forces on a skydiverduring a jump. Which of these statements

is not true?

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1. Her weight stays the same.2. Her air resistance stays the same.3. Her air resistance is very small at

the beginning of the jump.4. Her air resistance increases as

her speed increases.

14. A skydiver reaches a maximum speed when:

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1. his air resistance has increased to balance his weight.

2. his air resistance has decreased to balance his weight.

3. his weight has increased to balance the air resistance.

4. his parachute opens.

15. This distance–time graph shows Mrs Martin driving her children to the cinema. Which part of the graph shows where

she stopped at some traffic lights?

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1. V to W2. W to X3. X to Y4. Y to Z

16. This speed–time graph shows the speed ofa skydiver. Which letter shows part of the graph where

the forces on him are balanced?

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1. A2. B3. C4. D

Participant Scores15 Charlotte De Grijs14 Jamie Burrell14 Jesper Van Marle14 Leonie Eulderink14 Eline Van den Haak