Ncert – class 9- science – Chapter 7 – Motion 2 Welcome to your Ncert – class 9- science – Chapter 7 – Motion 2 1. A reference point which is used for observing the motion is called initial point horizon origin final point None 2. Instantaneous speed of a vehicle is measured by speedometer odometer both a and b none of these. None 3. Which of the following is a vector quantity? A Retardation B Speed C Force D Distance All of these (a) and (c) are correct (b) and (c) are correct (a), (b) and (c) are correct None 4. 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 (a) and (b) are correct (b) and (c) are correct All of these None 5. 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 6. 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 A both a and b Statement B neither statement A nor B. None 7. The ______ of a distance versus time graph is speed. slope origin none of the above y-intercept None 8. 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-A, 2-C, 3-B, 4-D 1-B, 2-D, 3-A, 4-C 1-C, 2-B, 3-D, 4-A 1-D, 2-A, 3-C, 4-B None 9. 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. 9.5 second. 9 second 8 second 8.5 second None 10. When you travel 40 km towards East and then 10 km towards West, your net displacement is 30 km towards West 50 km towards West 50 km towards East 30 km towards East None 11. A particle covers equal distance in equal interval of time. It is said to be at rest moving with constant speed (ans) none of these moving with constant acceleration None 12. 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 (a) and (b) are correct (b) and (c) are correct All of these (b), (c) and (d) are correct None 13. If the speed-time graph is a straight line parallel to the time axis, then the body is in accelerated motion uniform motion at rest non-uniform accelerated motion None 14. 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 neither statement A nor Statement B is true. statement A is true, B is false statement B is false, A is true Both the statement A and B are true None 15. Name the instrument used to measure instantaneous speed of a vehicle. Multimeter Accelerator Speedometer Ammeter 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.
