This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Motion > Class 9 Science Chapter 8 Motion – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 8 Motion Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The slope in distance time graph gives us A) Velocity. B) Speed. C) Acceleration. D) None. Show Answer Correct Answer: B) Speed. 2. An object is in motion if it changes position relative to A) Speed. B) The distance traveled. C) A reference point. D) Constant speed. Show Answer Correct Answer: C) A reference point. 3. If the displacement of an object is proportional to square of time, then the object moves with ..... A) Increasing acceleration. B) Uniform velocity. C) Uniform acceleration. D) Decreasing acceleration. Show Answer Correct Answer: C) Uniform acceleration. 4. A farmer moves along the boundary of a square field of side 10m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position? A) 15.15m. B) 13. C) 14.14, m. D) None of the above. Show Answer Correct Answer: C) 14.14, m. 5. A car accelerates uniformly from 18 km/hr to 36 km/hr in 5 s. Calculate the distance covered by the car. A) 70 m. B) 50.50m. C) 37.Infection. D) 40. Show Answer Correct Answer: C) 37.Infection. 6. What is the unit for distance? A) Meters (m). B) Meters per second (m/s). C) Feet (ft). D) Meters per second per second (m/s/s or m/s$^{2}$). Show Answer Correct Answer: A) Meters (m). 7. Kanha leaves for his school from his house at 9:00 am and returns home at 11:00 am. Find its average speed and average velocity for the entire journey. The school is 2 km away from Kanha's house. A) 1 km/h, 1 km/h. B) 2 km/h, 2 km/h. C) 2 km/h, 0. D) 1 km/h, 2 km/h. Show Answer Correct Answer: C) 2 km/h, 0. 8. Which of the following is most likely not a case of uniform circular motion? A) Motion of the earth around the sun. B) Motion of a toy train on a circular track. C) Motion of a racing car on a circular track. D) Motion of hours' hand on the dial of a clock. Show Answer Correct Answer: C) Motion of a racing car on a circular track. 9. A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is ..... A) U/2g. B) U/g. C) U2/g. D) U2/2g. Show Answer Correct Answer: D) U2/2g. 10. A stone is thrown in a vertically upward direction with a velocity of 5 m/s. If the acceleration of the stone during its motion is 10 m/s2 in the down direction, what will be the height attained by the stone and how much time will it take to reach there? A) H=1.25m T=0.5s. B) H=2.55m T=0.5s. C) H=1.25m T=0.55s. D) None of the above. Show Answer Correct Answer: A) H=1.25m T=0.5s. 11. Example of Uniform Motion A) The bus is moving on a straight line. B) A car is moving on a crowded street. C) A person jogging in the park. D) None of the above. Show Answer Correct Answer: A) The bus is moving on a straight line. 12. What is the unit for velocity? A) Meters (m). B) Meters per second (m/s). C) Feet (ft). D) Meters per second per second (m/s/s or m/s$^{2}$). Show Answer Correct Answer: B) Meters per second (m/s). 13. A student completes his journey from his house to school with an average speed of 5m/ s in 10 minutes. If the student travels with the speed of 5 m/ s in first 4 minutes. What will be its speed in next 6 minutes? A) 12.5 m/s. B) 5 m/s. C) 7.5 m/s. D) 10 m/s. Show Answer Correct Answer: B) 5 m/s. 14. A change in position of an object. A) Force. B) Motion. C) Weight. D) Mass. Show Answer Correct Answer: B) Motion. 15. The S.I. unit of acceleration is: A) Ms$^{-2}$. B) Ms$^{2}$. C) M. D) Ms. Show Answer Correct Answer: B) Ms$^{2}$. 16. Acceleration occurs when an object changes its speed or ..... A) Direction. B) Force. C) Inertia. D) Mass. Show Answer Correct Answer: A) Direction. 17. What does the area enclosed by the velocity-time graph indicate? A) Distance. B) Speed. C) Velocity. D) Displacement. Show Answer Correct Answer: A) Distance. 18. An object may have ..... A) Varying velocity without having varying speed. B) Non-zero acceleration without having varying speed. C) Varying speed without having varying velocity. D) Non-zero acceleration without having varying velocity. Show Answer Correct Answer: A) Varying velocity without having varying speed. 19. A person walks 50 meters directly north, stops, and then travels 32 meters directly south. What is their displacement? A) 82 meters. B) 18 meters. C) 28 meters. D) None of the above. Show Answer Correct Answer: B) 18 meters. 20. Displacement is represented by- A) Area under s-t graph. B) Area under v-t graph. C) Slope of s-t graph. D) Slope of v-t graph. Show Answer Correct Answer: B) Area under v-t graph. 21. The area under a velocity-time graph represents the ..... A) Displacement. B) Average speed. C) Distance travelled. D) Acceleration. Show Answer Correct Answer: A) Displacement. 22. A quantity that has both magnitude and direction is called a scalar quantity. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. The distance covered by a car moving at a speed of 36 km/hour in 10 minutes is: A) ZKM. B) 1km. C) ShcM. D) 18km. Show Answer Correct Answer: C) ShcM. 24. An example of a body moving with constant speed but still accelerating is ..... A) A body moving with constant speed in a circular path. B) A body moving in a helical path with constant speed. C) A body moving with constant speed on a straight railway track. D) A body moving with constant speed on a straight road. Show Answer Correct Answer: A) A body moving with constant speed in a circular path. 25. In a free fall the velocity of a stone is increasing equally in 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. 26. What is the process of changing position? A) Motion. B) Velocity. C) Displacement. D) Speed. Show Answer Correct Answer: A) Motion. 27. Acceleration of an object happens when things ..... A) Slow down. B) Go faster. C) Change direction (turn). D) All of the above. Show Answer Correct Answer: D) All of the above. 28. A particle moving in a straight line covers half the distance with speed of 3 m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. The average speed of the particle during this motion is A) 5.0 m/s. B) 5.5 m/s. C) 4.0 m/s. D) 4.8 m/s. Show Answer Correct Answer: C) 4.0 m/s. 29. A boy walks 10m in straight path moving away from a lamp pole in a garden and walks5m back on the same path.What is the displacement of the boy from the lamp pole? A) 10m. B) 0m. C) 15m. D) Infection. Show Answer Correct Answer: D) Infection. 30. Hi! I am important thing for vehicles ..... without me nobody can measure their speed. I have a stick between me which always disturbs my view to world. Do you know I changed to digital India. Can you guess who am I? A) Odometer. B) Speedometer. C) All the above. D) None of the above. Show Answer Correct Answer: B) Speedometer. 31. What is the total length of how far you traveled? A) Speed. B) Displacement. C) Velocity. D) Distance. Show Answer Correct Answer: D) Distance. 32. Speed of an object is equal to the magnitude of velocity if- A) The object is travelling in uniform circular motion. B) The object is travelling along a straight path. C) The initial and final positions are same. D) None of these. Show Answer Correct Answer: B) The object is travelling along a straight path. 33. If a moving body comes to rest, then its acceleration is- A) Positive. B) Negative. C) Zero. D) All of these depending upon initial velocity. Show Answer Correct Answer: B) Negative. 34. A car travels 240 km in 2 hours and a sprinter travels 100 m in 9.5 sec. Who is traveling faster? A) They are traveling the same speed. B) The sprinter. C) Not enough information to answer this question. D) The car. Show Answer Correct Answer: D) The car. 35. The total path of length travelled by a body in a given interval of time is called ..... A) Distance. B) Velocity. C) Displacemant. D) None of the above. Show Answer Correct Answer: A) Distance. 36. A complete description of motion includes a reference point, your displacement, and your direction. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 37. The Rate of change of displacement is called ..... A) Deceleration. B) Velocity. C) Acceleration. D) Speed. Show Answer Correct Answer: B) Velocity. 38. The tip of seconds hand clock takes 60 s to move once on the circular dial of the clock. If the radius of the dial is 10.5 cm. Calculate the speed. (Take pi=22/7) A) 0.5m/s. B) 0.11m/s. C) 0.66m/s. D) None of the above. Show Answer Correct Answer: B) 0.11m/s. 39. A car travels on a straight road with a velocity of 25km/ hour in first one hour and in the next one hour it changes its speed to 35km/ hour. What is the average velocity of the car? A) 30km/h. B) 20km/h. C) 30.30 km/h. D) None of the above. Show Answer Correct Answer: A) 30km/h. 40. Automobiles are fitted with a device that show the distance traveled. such a device is known ..... (a) odometer (b) Speedo meter (C) octameter (D) decameter A) C. B) B. C) A. D) D. Show Answer Correct Answer: C) A. 41. A change in velocity over time is A) Motion. B) Scalar. C) Speed. D) Acceleration. Show Answer Correct Answer: D) Acceleration. 42. When a body is at rest, its velocity is: A) Zero. B) Negative. C) Positive. D) Unity. Show Answer Correct Answer: A) Zero. 43. Which of the following can sometimes be 'zero' for a moving body?i. Average velocityii. Distance travellediii. Average speed iv. Displacement A) Only (i). B) (i) and (ii). C) (i) and (iv). D) Only (iv). Show Answer Correct Answer: C) (i) and (iv). 44. Average velocity can be calculated by:a) (u+v)/2 b) uv/2 c)-(v-u)/2 d)-(u-v)/2 A) D. B) A. C) B. D) C. Show Answer Correct Answer: B) A. 45. Name the instrument used to measure instantaneous speed of a vehicle A) Ammeter. B) Multimeter. C) Speedometer. D) Accelerator. Show Answer Correct Answer: C) Speedometer. 46. ..... is the length of the path between two points. A) Statistic. B) Distance. C) Reference. D) Law. Show Answer Correct Answer: B) Distance. 47. Abdul while driving to school computes the average speed for his trip to be 20 km per hour on his return trip along the same route there is less traffic and average speed is 30 km per hour.What is the average speed for Abdul strip A) 25km/hr. B) 24km/hr. C) 46km/hr. D) None of the above. Show Answer Correct Answer: B) 24km/hr. 48. Two cars X and Y are travelling along a straight road. The two cars are said to be in uniform motion when: A) The two cars travel with same speed. B) The speed of the cars reduces with the same rate. C) The two cars travels equal distance in equal interval of time. D) They continuously travel along the straight road. Show Answer Correct Answer: C) The two cars travels equal distance in equal interval of time. 49. In circular motion, the radius vector ..... A) (a) has a constant magnitude and direction. B) (b) changes in magnitude and direction. C) (c) changes in magnitude but has a fixed direction. D) (d changes in direction but has a fixed magnitude. Show Answer Correct Answer: D) (d changes in direction but has a fixed magnitude. 50. An object moves along a curved path. The following quantities may remain constant during its motion. A) Speed. B) Velocity. C) Magnitude of acceleration. D) Both 'a' and 'c'. Show Answer Correct Answer: D) Both 'a' and 'c'. 51. Given:$v_i=10\frac{m}{s}\\\\\ldots\\\\v_f=15\frac{m}{s}\\\\ldots\\\\a=10\\frac{m}{s^2}$ A) $v_f^2=v_i^2+2ad$. B) $d=\\\frac{(v_i+v_f)}{2}t$. C) $v_f=v_i+at$. D) $d=v_it+\frac{1}{2}at^2$. E) Cannot be done in a single step. Show Answer Correct Answer: C) $v_f=v_i+at$. 52. A particle is moving in a circular path of radius r. The displacement after half a circle would be: A) $0$. B) $ 2 \pi r $. C) $ \pi r $. D) $2r$. Show Answer Correct Answer: D) $2r$. 53. A person travels on a semi-circular track of radius 50 m during a morning walk. If he starts from one end of the track and reaches the other end, calculates the distance traveled and displacement of the person. A) Distance travelled is 157.14m and Displacement is 100m. B) Distance travelled is 154.81m and Displacement is 101m. C) Distance travelled is 182.71m and Displacement is 111m. D) Distance travelled is 181.88m and Displacement is 112m. Show Answer Correct Answer: A) Distance travelled is 157.14m and Displacement is 100m. 54. The average velocity of a body is given by the expression: A) V= u+ at. B) V $ _ {of} $ = (U + V)/2. C) 2as= v$^{2}$-u$^{2}$. D) S = UT + 1/2 a t $ {2} $. Show Answer Correct Answer: B) V $ _ {of} $ = (U + V)/2. 55. The distance between your final position and your starting position is displacement. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 56. An object is projected upwards with a velocity 0f 100 m/s. It will strike the ground after ( approximately ) A) 10 s. B) 15 s. C) 20s. D) 5 s. Show Answer Correct Answer: C) 20s. 57. Bill runs 400 meters to Andy's house, turns around, and runs 400 meters back home. What is Bill's distance? A) 800 meters. B) 0 meters. C) 400 meters. D) 1600 meters. Show Answer Correct Answer: A) 800 meters. 58. When a body moves uniformly along the circle, then: A) It's velocity changes but speed remains the same. B) It's speed changes but velocity remains the same. C) Both speed and velocity remains the same. D) Both speed an velocity changes. Show Answer Correct Answer: A) It's velocity changes but speed remains the same. 59. If a runner covers a distance of 347 meters in 134 seconds, what is her speed? A) 2.59 m/s. B) 6.78 m/s. C) 0.39 m/s. D) 46, 498 m/s. Show Answer Correct Answer: A) 2.59 m/s. 60. A person travels a distance of 4.0 m towards the east, then turns left and travels 3.0 m towards the north.1. What is the total distance traveled by the person toward north?2. What is his displacement? A) Total distance 7m and Total displacement 5m. B) Total distance 5m and Total displacement 7m. C) Total distance 4m and Total displacement 8m. D) Total distance 3m and Total displacement 9m. Show Answer Correct Answer: A) Total distance 7m and Total displacement 5m. ← PreviousNext →Related QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 8 Motion Quiz 1Class 9 Science Chapter 8 Motion Quiz 3 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books