Speed is distance ÷ time and metre per second is a unit of speed, so this Year 8 sheet opens with the relation and its unit. The answers add that velocity includes a direction, an acceleration result of 2 m/s² and a stationary graph answer.
Key Takeaways
Speed = distance ÷ time (Q1).
Metre per second is a unit of speed (Q2).
Q3 records that velocity includes a direction.
Section A: Multiple Choice Questions (1 Mark Each)
Choose the correct option for each question.
1.The equation linking speed, distance and time is...
(a) newton(b) metre per second(c) kilogram(d) second
3.Velocity differs from speed because velocity...
(a) has no direction(b) is measured in metres per second(c) includes a direction(d) is always constant
4.A car accelerates from rest to 10 m/s in 5 s. Its acceleration is...
(a) 2 m/s²(b) 0.5 m/s²(c) 50 m/s²(d) 15 m/s²
5.On a distance-time graph, a steeper line means the object is moving...
(a) slower(b) faster(c) at the same speed(d) backwards
6.A horizontal flat line on a distance-time graph means the object is...
(a) accelerating(b) moving at constant speed(c) stationary(d) moving in a circle
Section B: Short Answer Type Questions (2 Marks Each)
Show all steps clearly.
7.State the unit of acceleration.
8.What is the difference between speed and velocity?
9.What does a straight diagonal line on a distance-time graph show?
10.State the formula for average speed and name its unit.
11.A car travels around a roundabout at a constant speed. Explain why its velocity is changing even though its speed is constant.
12.State the formula for acceleration and give its unit.
13.What does a flat horizontal line on a speed-time graph mean?
14.What quantity does the area under a speed-time graph represent?
Section C: Numericals & Word Problems (3 Marks Each)
Apply the concepts to solve the problems. Show all working.
15.A car travels 200 m in 10 s. Use speed = distance ÷ time to calculate its average speed in m/s.
16.A cyclist travels 30 km in 2 hours. Calculate the average speed in km/h.
17.A train travels 180 km at an average speed of 90 km/h. Use time = distance ÷ speed to calculate the time taken in hours.
18.A car accelerates from rest to 20 m/s in 4 s. Use acceleration = change in velocity ÷ time to calculate its acceleration in m/s².
19.A runner slows from 8 m/s to 2 m/s in 3 s. Calculate the deceleration using acceleration = change in velocity ÷ time.
20.A car travels at a steady 15 m/s for 2 minutes. First convert 2 minutes to seconds, then use distance = speed × time to find the distance travelled in metres.
Answer Key
1. b) speed = distance ÷ time
2. b) metre per second
3. c) includes a direction
4. a) 2 m/s²
5. b) faster
6. c) stationary
7. Refer to solution guide.
8. Refer to solution guide.
9. Refer to solution guide.
10. Refer to solution guide.
11. Refer to solution guide.
12. Refer to solution guide.
13. Refer to solution guide.
14. Refer to solution guide.
15. Refer to solution guide.
16. Refer to solution guide.
17. Refer to solution guide.
18. Refer to solution guide.
19. Refer to solution guide.
20. Refer to solution guide.
End of Worksheet
People Also Ask
What is the equation for speed?
Speed = distance ÷ time, option (b) in this worksheet (Q1).
Which of these is a unit of speed?
Metre per second, option (b) in this worksheet (Q2).
How does velocity differ from speed?
It includes a direction, option (c) in this worksheet (Q3).
Stuck on a similar problem? Clear your next doubt instantly with the Doubt Solver.
Browse more free worksheets for IGCSE Year 8.