This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Motion > Class 9 Science Chapter 8 Motion – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 8 Motion Quiz 3 (42 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Suppose a boy is enjoying a ride on a marry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is: A) Moving with no acceleration. B) At rest. C) Moving with uniform velocity. D) In accelerated motion. Show Answer Correct Answer: D) In accelerated motion. 2. A firefighter drops from a window into a net. If the window is 34 meters above the net, the speed with which firefighter hit the net A) 18 m/s. B) 20 m/s. C) 26 m/s. D) 12 m/s. Show Answer Correct Answer: C) 26 m/s. 3. What is the starting point used to describe the motion or position of an object? A) Displacement. B) Velocity. C) Starting line. D) Reference point. Show Answer Correct Answer: D) Reference point. 4. What distance will a car traveling 65 km/hr travel in 180 min? A) 195 m. B) 2.77 m. C) 21.7 m. D) 11, 700 m. Show Answer Correct Answer: A) 195 m. 5. The distance an object moves is A) Acceleration. B) Displacement. C) Velocity. D) Speed. Show Answer Correct Answer: D) Speed. 6. A change in speed over a given period of time is A) Acceleration. B) Speed. C) Velocity. D) Motion. Show Answer Correct Answer: A) Acceleration. 7. What is the formula to solve for the speed of an object? A) S=d/t. B) S=d x t. C) S=t/d. D) None of the above. Show Answer Correct Answer: A) S=d/t. 8. Which of the following can sometimes be 'zero' for a moving body? A) Distance travelled. B) Displacement. C) Average speed. D) Average velocity. Show Answer Correct Answer: D) Average velocity. 9. A train moving with velocity of 54 km/hr is accelerated so that its velocity becomes 72 km/hr in 15 s. Find the acceleration of the train? A) 0.33m/s$^{-2}$. B) 0.45m/s$^{-2}$. C) All the above. D) None of the above. Show Answer Correct Answer: A) 0.33m/s$^{-2}$. 10. Which information is needed to determine how fast a truck is traveling? A) Direction and mass. B) Distance and time. C) Size and speed. D) Time and weight. Show Answer Correct Answer: B) Distance and time. 11. A moving train is brought to rest within 20 seconds by applying brakes. If the retardation due to brakes is 2 m/s$^{2}$, then the initial velocity was, A) 20 m/s. B) 30 m/s. C) 10 m/s. D) 40 m/s. Show Answer Correct Answer: D) 40 m/s. 12. Which of these is your favorite? A) Stars. B) Planets. C) Comets. D) None of the above. Show Answer Correct Answer: A) Stars. 13. What is the equation to calculate speed? A) Speed = time/distance. B) Speed = distance/time. C) Speed = speed/time. D) Speed = time x distance. Show Answer Correct Answer: B) Speed = distance/time. 14. Position time graph for zero acceleration- A) Straight line parallel to time axis. B) Straight line passing through origin. C) Curved line. D) Zig zag line. Show Answer Correct Answer: B) Straight line passing through origin. 15. What is magnitude? A) The direction that describes a quantity. B) A numerical value. C) A unit of force. D) None of the above. Show Answer Correct Answer: B) A numerical value. 16. A body, moving in a straight line, with an initial velocity u and a constant acceleration a, covers a distance of 40 m in the 4$^{th}$ second and a distance of 60 m in the 6$^{th}$ second. The values of u and a respectively are A) 5 m s$^{-1}$, 5 m s$^{-2}$. B) 5 m s $^{-1}$, 10 m s$^{-2}$. C) 10 m s$^{-1}$, 5 m s$^{-2}$. D) 10 m s$^{-1}$, 10 m s$^{-2 }$. Show Answer Correct Answer: B) 5 m s $^{-1}$, 10 m s$^{-2}$. 17. What is the least distance between the starting and ending points? A) Distance. B) Reference point. C) Motion. D) Displacement. Show Answer Correct Answer: D) Displacement. 18. During an experiment, a signal from the spaceship reached the ground station in five min. What was the distance of the spaceship from the ground? The signal travels at the speed of 3*10$^{8}$m/s$^{2}$ A) 9*10$^{6}$. B) 3*10$^{9}$. C) 9*10$^{10}$. D) None of the above. Show Answer Correct Answer: C) 9*10$^{10}$. 19. The measure of how quickly something moves or the distance it moves in a given amount of time is called A) Location. B) Speed. C) Position. D) Motion. Show Answer Correct Answer: B) Speed. 20. A body travels from position A to position B with a velocity of 40 m/s and return from B to A with a velocity of 40 m/s. Then average speed of the body is: A) 45 m/s. B) 40 m/s. C) 25 m/s. D) 70 m/s. Show Answer Correct Answer: B) 40 m/s. 21. Can uniform linear motion be accelerated? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 22. How can you find the distance around a circle? A) D/t. B) 2PR. C) V$^{2}$. D) T. Show Answer Correct Answer: B) 2PR. 23. The speed of a moving object is determined to be 108 km/h. This speed is equal to: A) 30 m/s. B) 20 m/s. C) 10 m/s. D) 40 m/s. Show Answer Correct Answer: A) 30 m/s. 24. The velocity of an object is its A) Speed and direction. B) Displacement. C) Distance. D) Acceleration and distance. Show Answer Correct Answer: A) Speed and direction. 25. Slope of distance time graph represents- A) Speed. B) Acceleration. C) Displacement. D) None of these. Show Answer Correct Answer: A) Speed. 26. A vehicle travels 2345 m in 315 s toward the evening sun. What is its speed? A) 0.13 m/s. B) 7.44 m/s. C) 738, 675 m/s. D) 7.44m. Show Answer Correct Answer: B) 7.44 m/s. 27. Find the velocity of a plane that traveled 3000 miles west in 5 hours. A) 600 mph west. B) 600 mph. C) 600 mph. D) 65 mph. Show Answer Correct Answer: A) 600 mph west. 28. The slope of speed-time graph gives A) Momentum. B) Acceleration. C) Velocity. D) Speed. Show Answer Correct Answer: B) Acceleration. 29. A man walks 10 meters east and 5 meters west. What was his displacement? A) 5 meters east. B) 15 meters east. C) 5 meters west. D) 15 meters west. Show Answer Correct Answer: A) 5 meters east. 30. Velocity has speed and direction. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 31. Acceleration:is the rate of change in ..... A) Displacement. B) Velocity. C) Distance. D) Speed. Show Answer Correct Answer: B) Velocity. 32. What is the equation for position-time relation A) S = ut + 1/2 at$^{2}$. B) S = out + 1/2. C) D = out + 1/2. D) D = ut + 1/2 at. Show Answer Correct Answer: A) S = ut + 1/2 at$^{2}$. 33. An object travels 40m in 5 sec and then another 80m in 5 sec. What is the average speed of the object? A) 2 m/s. B) 0 m/s. C) 6 m/s. D) 12 m/s. Show Answer Correct Answer: D) 12 m/s. 34. A man travels a distance of 20 km from his home to office, and 10 km towards his house back. Then the displacement covered by the man in the whole trip is A) 0 km. B) 50 km. C) 30 km. D) 10 km. Show Answer Correct Answer: D) 10 km. 35. What is the metric unit for speed? A) M/s. B) H/km. C) Cm$^{3}$. D) Km. Show Answer Correct Answer: A) M/s. 36. What is the slope of the body when it moves with uniform velocity? A) Negative. B) Positive. C) May be positive or negative. D) Zero. Show Answer Correct Answer: A) Negative. 37. Is any push or pull. A) Force. B) Motion. C) Mass. D) Weight. Show Answer Correct Answer: A) Force. 38. The formula to determine speed is A) Change in distance/change in time. B) Time/distance. C) Distance/time. D) Change in velocity/change in time. Show Answer Correct Answer: C) Distance/time. 39. The velocity-time graph of a particle is not a straight line. Its acceleration is A) Zero. B) Variable. C) Constant. D) Negative. Show Answer Correct Answer: B) Variable. 40. The angular velocity of the second hand of a clock is A) 3.120 rad/s. B) 1.105 rad/s. C) 2.102 rad/s. D) 0.105 rad/s. Show Answer Correct Answer: D) 0.105 rad/s. 41. In a free fall the velocity of a stone is increasing equally ion equal intervals of time under the effect of gravitational force of the earth. Then what can you say about the motion of this stone? Whether the stone is having: A) Retardation. B) Constant speed. C) Uniform acceleration. D) Non-uniform acceleration. Show Answer Correct Answer: C) Uniform acceleration. 42. On a distance vs. time graph, the steeper the slope ..... A) The faster the speed. B) The slower the speed. C) Greater acceleration. D) Less acceleration. Show Answer Correct Answer: A) The faster the speed. ← PreviousRelated QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 8 Motion Quiz 1Class 9 Science Chapter 8 Motion Quiz 2 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books