This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A man is standing on a boat in still water. If he walks towards the shore, then the boat will A) Move away from the shore. B) Move towards the shore. C) Remain stationary. D) None of these. Show Answer Correct Answer: A) Move away from the shore. 2. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goal keeper to A) Exert larger force on the ball. B) Reduce the force exerted by the ball on hands. C) Increase the rate of change of momentum. D) Decrease the rate of change of momentum. Show Answer Correct Answer: B) Reduce the force exerted by the ball on hands. 3. Inertia is that property of a body by virtue of which the body is A) Unable to change by itself the state of rest only. B) Unable to change by itself the state of motion only. C) Unable to change by itself the direction of motion only. D) Unable to change by itself the state of rest and of uniform motion. Show Answer Correct Answer: D) Unable to change by itself the state of rest and of uniform motion. 4. How many law of motion are there? A) 4. B) 8. C) 2. D) 3. E) 0. Show Answer Correct Answer: D) 3. 5. If you double the mass of an object with the same force apply on it, the acceleration will A) Double. B) Cut in half. C) The same. D) Zero. Show Answer Correct Answer: B) Cut in half. 6. The force that draws all objects towards Earth. A) Friction. B) Gravity. C) Mass. D) Acceleration. Show Answer Correct Answer: B) Gravity. 7. A force that opposes motion is A) Friction. B) Inertia. C) Acceleration. D) Momentum. Show Answer Correct Answer: A) Friction. 8. Inertia is the tendency of an object to resist a change in its ..... A) Temperature. B) Shape. C) Size. D) Motion. Show Answer Correct Answer: D) Motion. 9. When a body is stationary it means that: A) There is no force acting on it. B) The combination of forces acting on it balance each other out. C) The body is in vacuum. D) The force acting on it is very less. Show Answer Correct Answer: B) The combination of forces acting on it balance each other out. 10. The natural tendency of objects to resist a change in their state of rest or uniform motion is called ..... A) Momentum. B) Conservation of force. C) Inertia. D) Acceleration. Show Answer Correct Answer: C) Inertia. 11. Rocket works on the principle of conservation of ..... A) MASS. B) ENERGY. C) MOMENTUM. D) VELOCITY. Show Answer Correct Answer: C) MOMENTUM. 12. A body, whose momentum is constant, must have constant A) Velocity. B) Force. C) Acceleration. D) All of these. Show Answer Correct Answer: A) Velocity. 13. I AN ACTION IS OF 10 N, THEN THE REACTION WILL BE OF A) 10 N IN THE SAME DIRECTION. B) 20 N IN THE SAME DIRECTION. C) 10 N IN THE OPPOSITE DIRECTION. D) 20 N IN THE OPPOSITE DIRECTION. Show Answer Correct Answer: C) 10 N IN THE OPPOSITE DIRECTION. 14. A ball of mass 2000g starting from rest moves with a speed of 5m/s for 10seconds. Find the force acting on it? A) 1 N. B) 100 N. C) 10 N. D) 1000 N. Show Answer Correct Answer: A) 1 N. 15. Which of the following situations is possible? A) An object can have acceleration, but constant velocity. B) The velocity of an object may be zero but acceleration is not zero. C) Distance and the magnitude of displacement are equal in circular motion. D) Average speed and the magnitude of average velocity are always equal in circular motion. Show Answer Correct Answer: B) The velocity of an object may be zero but acceleration is not zero. 16. A force can: A) Change the state of motion of an object. B) Change the shape of an object. C) Both (a) and (b). D) None of the above. Show Answer Correct Answer: C) Both (a) and (b). 17. Newton's first law that says an object at rest will remain at rest unless acted upon by an unbalanced force is also called the law of A) Acceleration. B) Inertia. C) Action and reaction. D) May the force be with you. Show Answer Correct Answer: B) Inertia. 18. The property of an object at rest to remain at rest is known as A) Inertia. B) Inertness. C) Resistance. D) Reaction. Show Answer Correct Answer: A) Inertia. 19. A body will continue in its state of rest or uniform motion, in a straight line, unless acted by some external force, the statement represents. A) Newton' s second law of motion. B) Newton's first law of motion. C) Newton's third law of motion. D) Law of conservation of momentum. Show Answer Correct Answer: B) Newton's first law of motion. 20. A ball of mass 10 g is initially moving with a velocity of 50 m/s. On applying a constant force on ball for 2 s, it acquires a velocity of 70 m/s. What is the rate of change of momentum? A) 0.2 kg m/s$^{2}$. B) 0.1 kg m/s$^{2}$. C) 0.3 kg m/s$^{2}$. D) 1.2 kg m/s$^{2}$. Show Answer Correct Answer: B) 0.1 kg m/s$^{2}$. 21. No force is required for: A) Changing the direction of a specific moving cart. B) Increasing the speed of the cart. C) Decreasing the speed of the cart. D) Moving the cart with same speed along the same direction. Show Answer Correct Answer: D) Moving the cart with same speed along the same direction. 22. When a force is applied to a body of mass 2 kg, its velocity changes from 20 ms-1 to 30ms-1 in 2 s. The rate of change of momentum of the body is: A) 10 N. B) 10.5 N. C) 10.8 N. D) 10. Show Answer Correct Answer: A) 10 N. 23. Forces are measured in: A) Inertia. B) Grams. C) Tons. D) Newtons. Show Answer Correct Answer: D) Newtons. 24. Effect of action of no net force acting on an object A) First law of motion. B) Second law of motion. C) Third law of motion. D) None of these. Show Answer Correct Answer: A) First law of motion. 25. Inertia is A) An AI tech. B) The natural tendency to support the change in state of motion of an object. C) The natural tendency to resist the change in state of motion of an object. D) None of the above. Show Answer Correct Answer: C) The natural tendency to resist the change in state of motion of an object. ← 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