Motion Quiz - ICSE Class 8 Science

Free practice quiz: Motion (ICSE Class 8 Science). 61 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 8 Science practice quiz has 61 multiple-choice questions on Motion, and 61 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. A car travels from point A to point B at a speed of 40 km/h and returns from point B to point A at a speed of 60 km/h. What is the average speed of the car for the entire journey?

   1. 48 km/h
   2. 50 km/h
   3. 52 km/h
   4. 60 km/h
   Show answer

   Answer: A. 48 km/h

   Let the distance between A and B be 'd' km. Time taken from A to B = d/40 hours. Time taken from B to A = d/60 hours. Total distance = 2d km. Total time = d/40 + d/60 = (3d + 2d)/120 = 5d/120 = d/24 hours. Average speed = Total distance / Total time = 2d / (d/24) = 2d * (24/d) = 48 km/h.

2. Which of the following graphs correctly represents uniform deceleration?

   1. A straight line with positive slope.
   2. A straight line with negative slope.
   3. A horizontal straight line.
   4. A curved line starting from a point on the velocity axis.
   Show answer

   Answer: B. A straight line with negative slope.

   Deceleration is negative acceleration, meaning the velocity is decreasing. In a velocity-time graph, a decreasing velocity is represented by a downward sloping line. Uniform deceleration means the rate of decrease is constant, hence a straight line with a negative slope.

3. Which statement best describes a scalar quantity?

   1. It has both magnitude and direction.
   2. It has magnitude only.
   3. It has direction only.
   4. It is always positive.
   Show answer

   Answer: B. It has magnitude only.

   A scalar quantity is a physical quantity that can be described by a single magnitude (or numerical value) and has no direction. Examples include mass, speed, distance, temperature, and time.

4. A vehicle is moving at a constant speed of 20 m/s. How far will it travel in 30 seconds?

   1. 500 meters
   2. 600 meters
   3. 650 meters
   4. 700 meters
   Show answer

   Answer: B. 600 meters

   Distance = Speed × Time. Given Speed = 20 m/s and Time = 30 s. Distance = 20 m/s × 30 s = 600 meters.

5. When an object is at rest, its velocity is:

   1. Constant and non-zero.
   2. Zero.
   3. Changing.
   4. Infinite.
   Show answer

   Answer: B. Zero.

   An object at rest means it is not moving. If it is not moving, its velocity (which includes speed and direction) is zero.

More questions in this quiz

Answers and explanations are in the full quiz.

1. When a body is in uniform motion, which of the following statements is true?
2. A train passes a platform in 30 seconds and a signal pole in 15 seconds. If the length of the train is 150 meters, what is the length of the platform?
3. Which of the following quantities is a vector quantity?
4. A particle starts from rest and accelerates uniformly at 2 m/s². What is its velocity after 10 seconds?
5. The slope of a velocity-time graph represents:
6. A body moves with constant speed but changing velocity. Which of the following motions is an example of this?
7. If a body is moving with uniform acceleration, its velocity-time graph will be:
8. What does the area under a velocity-time graph represent?
9. A runner completes one lap of a circular track of radius 100 meters in 40 seconds. What is the average velocity of the runner for one lap?
10. Two bodies A and B are dropped from the same height. Body A is dropped from rest, while body B is thrown downwards with an initial velocity. Neglecting air resistance, which body will reach the ground first?
11. A car accelerates from 10 m/s to 30 m/s in 5 seconds. What is its acceleration?
12. A body is thrown vertically upwards with an initial velocity of 20 m/s. If g = 10 m/s², what is the maximum height reached by the body?
13. When is the displacement of a moving object equal to the distance covered?
14. A 100m long train is moving with a uniform velocity of 72 km/h. How long does it take to pass a signal post?
15. When a body moves with uniform velocity, the distance-time graph is:
16. A car travels the first half of a certain distance at a speed of 30 km/h and the second half at a speed of 50 km/h. What is the average speed of the car for the entire journey?
17. Which of the following statements is true regarding circular motion at constant speed?
18. A body starts from rest and covers a distance of 10 meters in the first second, 20 meters in the second second, and 30 meters in the third second. This motion is:
19. A particle is projected horizontally with a velocity v from a height h. What is the magnitude of its velocity when it hits the ground?
20. If a body travels in a straight line with constant speed, its acceleration is:
21. Which of the following is NOT a unit of speed?
22. A body is dropped from a height and reaches the ground in 5 seconds. What is the height from which it was dropped? (g = 10 m/s²)
23. A car starts from rest and moves with a constant acceleration of 5 m/s². What is its velocity after 8 seconds?
24. The distance-time graph of a body moving with uniform speed is a straight line inclined to the time axis. The slope of this line represents:
25. A body moves with a velocity of 10 m/s for 5 seconds, then its velocity changes to 20 m/s in the next 5 seconds. What is the total distance covered?
26. Which of the following quantities is a scalar quantity?
27. A car travels a distance of 100 meters in 10 seconds, then turns back and travels 50 meters in 5 seconds. What is the average speed for the entire journey?
28. Which of the following is a vector quantity?
29. A body is moving such that its distance from a fixed point is always constant. What type of motion is this?
30. If the speed of a moving object is constant, what can be said about its velocity?
31. A car travels 10 km North, then 10 km East, then 10 km South. What is the displacement of the car from its starting point?
32. Which of the following correctly defines acceleration?
33. Which of the following units is used to measure distance?
34. A body is moving with uniform acceleration. Which of the following equations is NOT correct for this motion?
35. When a body is moving with non-uniform acceleration, its velocity-time graph is:
36. Two cars, A and B, start from the same point and at the same time. Car A travels North at 30 km/h and Car B travels East at 40 km/h. What is the relative velocity of Car B with respect to Car A?
37. What is the distance covered by an object moving with uniform velocity 'v' in time 't'?
38. If an object starts from rest and accelerates uniformly, the distance covered is proportional to:
39. A ball is dropped from a height. Which graph represents its speed-time graph?
40. Which quantity represents the rate of change of velocity?
41. A train travels at 60 km/h for 2 hours, then at 80 km/h for 3 hours. What is its average speed for the entire journey?
42. What does the area enclosed by a distance-time graph and the time axis represent?
43. Which of the following is the correct SI unit for velocity?
44. A body travels half the distance with speed v1 and the other half with speed v2. What is the average speed for the entire journey?
45. A scooter travels at a speed of 30 m/s for 10 seconds. What is the distance covered?
46. The velocity of a body decreases from 20 m/s to 10 m/s in 5 seconds. What is its acceleration?
47. Which of the following describes uniform circular motion?
48. A body travels a distance 's' in time 't'. If it travels the first half of the distance (s/2) with speed v1 and the second half of the distance (s/2) with speed v2, what is the average speed for the entire journey?
49. Which statement is true about the velocity of an object in uniform motion?
50. Which unit is NOT a unit of speed?
51. If a body travels in a straight line and its velocity is constant, what is its acceleration?
52. A car travels 20 km in 30 minutes. What is its average speed in km/h?
53. When is displacement equal to the distance traveled?
54. A body thrown vertically upwards reaches its maximum height in 4 seconds. What is the total time it takes to return to the ground?
55. Which of the following is an example of non-uniform motion?
56. A body covers distances in the ratio 1:3:5 in consecutive equal time intervals. This indicates:

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