Ncert – class 9- science – Chapter 7 – Motion 2 Welcome to your Ncert – class 9- science – Chapter 7 – Motion 2 1. Instantaneous speed of a vehicle is measured by both a and b none of these. odometer speedometer None 2. If the speed-time graph is a straight line parallel to the time axis, then the body is in uniform motion non-uniform accelerated motion at rest accelerated motion None 3. Statement A: When a body moves with uniform speed, then the average speed is same as instantaneous speed. Statement B: Average speed is less than average velocity. Which of the above statement is true Statement B neither statement A nor B. both a and b Statement A None 4. The ______ of a distance versus time graph is speed. none of the above y-intercept origin slope None 5. Which of the following is a vector quantity? A Retardation B Speed C Force D Distance (b) and (c) are correct All of these (a), (b) and (c) are correct (a) and (c) are correct None 6. Which of the following is an example of uniform motion? A The motion of car in the busy road B The motion of a satellite around the planet C The motion of moon around the earth D The motion of any particle on the arm of a clock (b) and (c) are correct (a) and (b) are correct All of these (b), (c) and (d) are correct None 7. Which of the is true for displacement? A It cannot be Zero B Its magnitude is greater than the distance travelled by the object C It’s the shortest distance between initial & final position D It is a vector quantity (a), (b) and (c) are correct (b) and (c) are correct All of these (a) and (b) are correct None 8. A particle covers equal distance in equal interval of time. It is said to be at rest none of these moving with constant acceleration moving with constant speed (ans) None 9. When you travel 40 km towards East and then 10 km towards West, your net displacement is 50 km towards West 30 km towards East 50 km towards East 30 km towards West None 10. A reference point which is used for observing the motion is called initial point origin horizon final point None 11. Match the following with correct response. (1) Speed (2) Velocity (3) Acceleration (4) Average speed (A) Displacement / Time taken (B) Total distance covered / Total time taken (C) Change in velocity / Time taken (D) Distance covered / Time taken 1-B, 2-D, 3-A, 4-C 1-C, 2-B, 3-D, 4-A 1-D, 2-A, 3-C, 4-B 1-A, 2-C, 3-B, 4-D None 12. Statement A: When a body moves with uniform speed, then the average speed is same as instantaneous speed. Statement B: Average speed is less than average velocity. Which of the above statement is true both a and b Statement A Statement B neither statement A nor B. None 13. Statement A: A curved line in a speed – time graph means non-uniform motion. Statement B : A curved line in a velocity – time graph means uniform acceleration statement B is false, A is true neither statement A nor Statement B is true. Both the statement A and B are true statement A is true, B is false None 14. Name the instrument used to measure instantaneous speed of a vehicle. Accelerator Multimeter Speedometer Ammeter None 15. A train 120m long moving on a straight and level track with uniform speed passes a pole in 6 seconds. Find the time it will take to cross a 50m long bridge. 9 second 8.5 second 8 second 9.5 second. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
