This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A basketball with a mass of 0.60 kg is accelerated with a force of 10.8 N. If resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s$^{2}$? A) 0.06 N. B) 6.48 m/s$^{2}$. C) 18 N. D) 18 m/s$^{2}$. Show Answer Correct Answer: D) 18 m/s$^{2}$. 2. What options are true about momentuma. Momentum is a vector quantityb. The Unit of Momentum is kgm/sc. Momentum is a scalar quantityd. When two bodies acts on each other and no external force is acting on the system, then the momentum remains constant A) Only a and b. B) Only a, b and c. C) Only b, c and d. D) Only a, b and d. Show Answer Correct Answer: D) Only a, b and d. 3. Which statement best explains Newton's Third Law of Motion? A) An object at rest tends to stay at rest. B) For every action there is an equal and opposite reaction. C) The acceleration of an object is based on the force applied. D) An object continues its motion until an unbalanced force is applied. Show Answer Correct Answer: B) For every action there is an equal and opposite reaction. 4. Momentum is represented with A) P. B) P. C) M. D) K. Show Answer Correct Answer: A) P. 5. The product of velocity and mass is called A) Force. B) Momentum. C) Velocity. D) Acceleration. Show Answer Correct Answer: B) Momentum. 6. A ball is moving over a horizontal smooth surface with a constant velocity. What type of forces are acting on the body? A) Balanced force. B) Unbalanced force. C) Both. D) None of the above. Show Answer Correct Answer: A) Balanced force. 7. A force is a ..... A) Push. B) Pull. C) Both A and B. D) None. Show Answer Correct Answer: C) Both A and B. 8. Force cannot change the velocity of an object. A) TRUE. B) FALSE. C) Only in some cases. D) None of the above. Show Answer Correct Answer: B) FALSE. 9. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to A) Exert larger force on the ball. B) Reduce the force exerted by the balls on the hands. C) Increase the rate of change of momentum. D) Decrease the rate of change of momentum. Show Answer Correct Answer: D) Decrease the rate of change of momentum. 10. A batsman hits a cricket ball which then rolls on a level ground after covering a short distance the ball comes to rest the ball close to stop because A) The batsman did not hit the ball hard enough. B) Velocity is proportional to the force exerted on the ball. C) There is a force on the ball opposing the motion. D) There is no unbalanced force on the ball so the ball would come to rest. Show Answer Correct Answer: C) There is a force on the ball opposing the motion. 11. Law of conservation of momentum states that the sum of momenta before a collision is equal to the sum of momenta after the collision provided ..... A) There is no external unbalanced force acting on them. B) There is an external unbalanced force acting on them. C) There may be one external unbalanced force acting on them. D) There might be an external unbalanced force acting on them. Show Answer Correct Answer: A) There is no external unbalanced force acting on them. 12. Which of these is an example of Newton's First Law, inertia? A) Pushing against a brick wall, and the brick wall does not move. B) Pushing against a stationary wheelbarrow, and the wheelbarrow accelerates forward. C) Pushing a wheelbarrow full of bricks, and the bricks slide back toward the handles. D) Pushing a wagon to the top of a hill, and the wagon to the top of hill and the wagon accelerates down the hill without assistance. Show Answer Correct Answer: C) Pushing a wheelbarrow full of bricks, and the bricks slide back toward the handles. 13. The Law of Conservation states:Without an ..... momentum of a system remains ..... A) Internal force; the same. B) External force; unchanged. C) Internal force; unchanged. D) External force; the same. Show Answer Correct Answer: B) External force; unchanged. 14. A passenger in a moving train tosses a coin which falls behind him. Observing this statement what can you say about the motion of the train? A) Accelerated. B) Retarded. C) Along circular tracks. D) Uniform. Show Answer Correct Answer: A) Accelerated. 15. If a 6 kg bowling ball is thrown with 28 N of force, how fast will it accelerate? A) 4.67 m/s$^{2}$. B) 0.21 m/s$^{2}$. C) 168 m/s$^{2}$. D) None of the above. Show Answer Correct Answer: A) 4.67 m/s$^{2}$. 16. A person force falling on a cemented floor get injured but a person falling on a heap of sand is not injured. Which law is used here? A) First law of motion. B) Second law of motion. C) Third law of motion. D) None of the above. Show Answer Correct Answer: B) Second law of motion. 17. When the force on a car is doubled, the acceleration is A) Worse. B) Doubled. C) Remains same. D) None of the above. Show Answer Correct Answer: B) Doubled. 18. If net force acting on object is 0, then the force is considered to be ..... A) Balanced. B) Unbalanced. C) Equal in Direction. D) Distance/Time. Show Answer Correct Answer: A) Balanced. 19. When a bus suddenly takes a turn, the passengers are thrown outwards because of A) Inertia of direction. B) Acceleration of motion. C) Speed of motion. D) Both (b) and (c). Show Answer Correct Answer: A) Inertia of direction. 20. SI unit of impulse is ..... A) N.M. B) KG.M/S. C) N. D) M/S. Show Answer Correct Answer: A) N.M. 21. A ship of mass 3 x 10$^{7}$ kg initially at rest is pulled by a force of 5 x 10$^{4}$ N through a distance of 3 m. The speed of the ship is A) 1.5 m s$^{-1}$. B) 0.1 m s$^{-1}$. C) 60 m s$^{-1}$. D) 5 m s$^{-1}$. Show Answer Correct Answer: B) 0.1 m s$^{-1}$. 22. Force of friction always acts in the direction A) Of applied force. B) Opposite to the direction of applied force. C) At right angles to the direction of force. D) None of the above. Show Answer Correct Answer: B) Opposite to the direction of applied force. 23. WHAT ARE DIFFERENT TYPES OF INERTIA A) INERTIA OF REST. B) INERTIA OF MOTION. C) INERTIA OF DIRECTION. D) ALL OF THESE. Show Answer Correct Answer: D) ALL OF THESE. 24. Newton's third law states ..... A) For each action there is a larger reaction associated with it. B) None of these choices. C) For each action there is an equal and opposite reaction. D) For each action there is a smaller reaction associated with it. Show Answer Correct Answer: C) For each action there is an equal and opposite reaction. 25. If an object has a small mass, it wouldn't need as strong of a force to accelerate it. Which law does this describe? A) Newton's 1st Law. B) Newton's 2nd Law. C) Newton's 3rd Law. D) Newton's 4th Law. Show Answer Correct Answer: B) Newton's 2nd Law. ← PreviousNext →Related QuizzesClass 9 Science Chapter 9 Force And Laws Of Motion Quiz 1Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 2Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 3Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 4Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 5Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 6Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 7Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 8Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 9Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books