Question 1

1. According to Source 1, what two pieces of information are needed to determine the speed of an object?

Accepted Answer

Distance travelled and time taken.

Answer

Mass and velocity.

Answer

Force and displacement.

Answer

Acceleration and time taken.

Question 2

2. What simple definition of speed is provided in Source 1?

Accepted Answer

How fast something is moving.

Answer

The change in velocity over time.

Answer

The rate at which an object changes its position.

Answer

The total distance travelled over a specific time interval.

Question 3

3. Source 1 uses the example of three cars travelling the same distance in different times to illustrate speed. What conclusion can be drawn from this example?

Accepted Answer

The car that travels the distance in the shortest amount of time has the greatest speed.

Answer

All three cars have the same speed because they cover the same distance.

Answer

The car that travels the distance in the shortest amount of time has the lowest speed.

Answer

Speed cannot be determined from the information given.

Question 4

4. Source 1 mentions several units for measuring speed. Which of the following is NOT a unit of speed?

Accepted Answer

Seconds.

Answer

Miles per hour.

Answer

Metres per second.

Answer

Kilometres per hour.

Question 5

5. What type of motion does Source 1 use as an example when defining speed?

Accepted Answer

Rectilinear motion.

Answer

Periodic motion.

Answer

Circular motion.

Answer

Rotational motion.

Question 6

6. A cyclist travels 60 kilometres in 2 hours. What is their average speed?

Accepted Answer

30 kilometres per hour.

Answer

60 kilometres per hour.

Answer

120 kilometres per hour.

Answer

15 kilometres per hour.

Question 7

7. A train travels at a constant speed of 100 kilometres per hour for 3 hours. What distance does it cover?

Accepted Answer

300 kilometres.

Answer

33.3 kilometres.

Answer

100 kilometres.

Answer

3,000 kilometres.

Question 8

8. A runner completes a 10 kilometre race in 40 minutes. What is their average speed in kilometres per hour?

Accepted Answer

15 kilometres per hour.

Answer

10 kilometres per hour.

Answer

6 kilometres per hour.

Answer

4 kilometres per hour.

Question 9

9. Two cars are travelling on the same road. Car A travels 100 kilometres in 1 hour, while Car B travels 150 kilometres in 2 hours. Which car has a greater average speed?

Accepted Answer

Both cars have the same average speed.

Answer

Cannot be determined from the information given.

Answer

Car B.

Answer

Car A.

Question 10

10. A plane flies 500 kilometres south in 1 hour. It then changes direction and flies 300 kilometres east in 30 minutes. What is its average speed for the entire journey?

Accepted Answer

500 kilometres per hour.

Answer

800 kilometres per hour.

Answer

200 kilometres per hour.

Answer

400 kilometres per hour.

Question 11

11. Source 1 explains that calculating speed often provides the average speed over a distance. Why is it important to distinguish between average speed and constant speed?

Accepted Answer

Average speed represents the overall speed over a period, while constant speed implies the speed remains the same throughout the motion.

Answer

Average speed and constant speed are the same thing.

Answer

Only average speed can be calculated.

Answer

Constant speed is a more useful concept than average speed in physics.

Question 12

12. How does the concept of speed help us understand and compare the motion of different objects?

Accepted Answer

It provides a quantifiable measure of how quickly an object covers distance, allowing for comparison of movement rates.

Answer

It reveals the forces acting upon an object, explaining the cause of motion.

Answer

It tells us the exact position of an object at any given time.

Answer

It indicates the direction of motion, allowing us to predict future positions.

Question 13

13. If an object is moving at a constant speed, what can we say about its velocity?

Accepted Answer

Its velocity may be constant, or it may be changing if the object is changing direction.

Answer

Its velocity must be zero.

Answer

Its velocity must also be constant.

Answer

Its velocity must be increasing.

Question 14

14. Source 1 uses the ratio of distance and time to define speed. How does this mathematical relationship help explain the concept of speed?

Accepted Answer

It highlights that speed is a measure of how much distance is covered within a specific time frame, emphasizing the interdependence of distance and time.

Answer

It proves that objects moving for longer durations always have greater speeds.

Answer

It demonstrates that speed is always a constant value.

Answer

It shows that speed is unrelated to distance or time.

Question 15

15. Why is it important to specify units when measuring and communicating speed?

Accepted Answer

Units provide a standardized way to express measurements, ensuring clear communication and accurate comparisons of speeds.

Answer

Units are irrelevant in physics.

Answer

Units only apply to distance, not speed.

Answer

Units are only necessary when calculating average speed.

Question 16

16. A cheetah runs 120 metres in 4 seconds. What is its speed?

Accepted Answer

30 metres per second.

Answer

4 metres per second.

Answer

12 metres per second.

Answer

480 metres per second.

Question 17

17. A snail crawls 1 metre in 10 minutes. What is its speed in centimetres per second?

Accepted Answer

0.17 centimetres per second.

Answer

1 centimetre per second.

Answer

10 centimetres per second.

Answer

1.67 centimetres per second.

Question 18

18. A car travels at a speed of 70 kilometres per hour for 2.5 hours. What distance does it cover?

Accepted Answer

175 kilometres.

Answer

70 kilometres.

Answer

28 kilometres.

Answer

140 kilometres.

Question 19

19. A train journey is 240 kilometres long. If the train travels at an average speed of 80 kilometres per hour, how long will the journey take?

Accepted Answer

3 hours.

Answer

2 hours.

Answer

1.5 hours.

Answer

4 hours.

Question 20

20. A cyclist wants to complete a 50 kilometre ride in 2 hours. What average speed must they maintain to achieve this goal?

Accepted Answer

25 kilometres per hour.

Answer

10 kilometres per hour.

Answer

12.5 kilometres per hour.

Answer

50 kilometres per hour.

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