This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Pushing a door open is an example of A) Contact force. B) Non-contact force. C) Field force. D) Frictional force. Show Answer Correct Answer: A) Contact force. 2. A cricket ball of mass 0.20 kg is moving with a velocity of 1.2m/s. Find the impulse on the ball and average force applied by the player if he is able to stop the ball in 0.10s? A) 1.2 N. S. B) Hc. C) 5.6N.S. D) 6.3N.S. Show Answer Correct Answer: A) 1.2 N. S. 3. A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity A) 4m/s. B) 8m/s. C) 32m/s. D) 16m/s. Show Answer Correct Answer: D) 16m/s. 4. According to Newton's ..... Law of Motion, when a hammer strikes and exerts force on a nail, the nail exerts an equal force back on the hammer. A) First. B) Second. C) Third. D) Fourth. Show Answer Correct Answer: C) Third. 5. A rocket works on the principle of: A) Newton's first law. B) Newton's second law. C) Newton's third law. D) Law of conservation of mass. Show Answer Correct Answer: C) Newton's third law. 6. Defination of momentumn is the motion of a body is known as momentumn. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Which of the following statements is not correct for an object moving along a straight path in an accelerated motion? A) Its speed keeps changing. B) Its velocity always changes. C) It always goes away from the Earth. D) A force is always acting on it. Show Answer Correct Answer: D) A force is always acting on it. 8. If a man jumps out of a boat, the boat moves A) Forward. B) Sidewards. C) Backwards. D) Downwards. Show Answer Correct Answer: C) Backwards. 9. The tendency of a body to resist its change of state is known as A) Force. B) Motion. C) Inertia. D) None of the above. Show Answer Correct Answer: C) Inertia. 10. The unit of measuring the momentum of a moving body is: A) M/s. B) Kg.m/s. C) Kg.m/s$^{2}$. D) N m$^{2}$/kg$^{2}$. Show Answer Correct Answer: B) Kg.m/s. 11. The inertia of an object tends to cause the object A) To increase its speed. B) To decrease its speed. C) To resist any change in its state of motion. D) To decelerate due to friction. Show Answer Correct Answer: C) To resist any change in its state of motion. 12. The greater the mass of an object, the more force it will take to accelerate the object. A) Newton's 1st Law of Motion. B) Newton's 2nd Law of Motion. C) Newton's 3rd Law of Motion. D) None of the above. Show Answer Correct Answer: B) Newton's 2nd Law of Motion. 13. An unbalanced force acts on a body. The body A) Must remain at rest. B) Must move with uniform velocity. C) Must be accelerated. D) Must move along a circle. Show Answer Correct Answer: C) Must be accelerated. 14. Is motion relative? A) Yes. B) No. C) I know but i don't remember now. D) Don't Know. Show Answer Correct Answer: A) Yes. 15. Slamming on the brakes in a moving car makes a passenger move forward against his or her seat belt because A) The passenger has the inertia to keep moving forward. B) The passenger is being pushed by the seats of the car. C) The passenger is better able to stop themselves in this manner. D) The passenger has an equal and opposite force supporting their weight. Show Answer Correct Answer: A) The passenger has the inertia to keep moving forward. 16. What will be the momentum of a stone having mass of 10 kg when it is thrown with a velocity of 4 metre per second? A) 40 kg metre per second. B) 20 kg metre per second. C) 4 kg metre per second. D) 2 kg metre per second. Show Answer Correct Answer: A) 40 kg metre per second. 17. The speed of a car weighing 1500 kg increases from 36 km/h to 72 km/h uniformly. What will be the change in momentum of the car? A) 15000 kg km/h. B) 15000 kg m/s. C) 54000 kg m/s. D) 54000 g m/s. Show Answer Correct Answer: B) 15000 kg m/s. 18. Complete the law:For every action, there is an ..... reaction. A) Equal and opposite. B) Equal. C) Opposite. D) Bigger and better. Show Answer Correct Answer: A) Equal and opposite. 19. Which object listed below has the greatest momentum? A) A 0.05 kg object rolling at 0.2 m/s. B) A 0.15 kg object rolling at 2 m/s. C) A 0.15 kg object rolling at 1 m/s. D) A 0.4 kg object rolling at 2 m/s. Show Answer Correct Answer: D) A 0.4 kg object rolling at 2 m/s. 20. When you push a boat off from the dock, you are demonstrating Newton's 3rd Law of Motion. It simply states that for every action there is an equal and opposite ..... ? A) Motion. B) Change. C) Reaction. D) Push. Show Answer Correct Answer: C) Reaction. 21. If a boy pushes a wall with a force of 10N towards east then the force exerted by the wall on the boy is ..... A) 10N towards EAST. B) 10N towards WEST. C) 20N towards east. D) 10N towards NORTH. Show Answer Correct Answer: B) 10N towards WEST. 22. When a person jumps from a boat, the boat moves backward due to: A) Newton's first law. B) Newton's second law. C) Newton's third law. D) Law of conservation of energy. Show Answer Correct Answer: C) Newton's third law. 23. Objects tendency to resist change A) Friction. B) Inertia. C) Force. D) Gravity. Show Answer Correct Answer: B) Inertia. 24. The force with which an objects slides on a frictionless table will be A) 100 N. B) 0 N. C) 50 N. D) Gravity-10 N. Show Answer Correct Answer: B) 0 N. 25. Inertia is the property of a body by virtue of which, it cannot change by itself A) Its state of rest. B) Its steady state of uniform motion. C) Its direction of motion. D) All of these. Show Answer Correct Answer: D) All of these. ← PreviousNext →Related QuizzesClass 9 Science Chapter 9 Force And Laws Of Motion Quiz 1Class 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 10Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books