This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The tendency of an object to stay in motion or at rest is called A) Velocity. B) Acceleration. C) Speed. D) Inertia. Show Answer Correct Answer: D) Inertia. 2. Newtons first law of motion is also known as ..... A) Law of force. B) Law of friction. C) Law of inertia. D) Law of momentum. Show Answer Correct Answer: C) Law of inertia. 3. Acceleration of an abject depends on its ..... as well as the force exerted on it. A) Mass. B) Momentum. C) Direction. D) None of the above. Show Answer Correct Answer: A) Mass. 4. Which one of the following statements is not correct for an object moving along a straight path in an accelerated motion? A) Its speed keep on changing. B) Its velocity always change. C) It always goes away from earth. D) A force is always acting on it. Show Answer Correct Answer: C) It always goes away from earth. 5. A body of mass 2 kg is moving with uniform velocity 2 m/s. Net force acting on it is A) 2 Newton. B) 4 Newton. C) 1 Newton. D) Zero. Show Answer Correct Answer: D) Zero. 6. Name the type of forces acting on the body when resultant force is not equal to zero A) Balanced force. B) Unbalanced force. C) Net force. D) All of the above. Show Answer Correct Answer: B) Unbalanced force. 7. Compared to its weight on Earth, a 10-kg object on the moon will weigh A) The same amount. B) Less. C) More. D) Square. Show Answer Correct Answer: B) Less. 8. And units of inertia A) Kg. B) M/s. C) N. D) All. Show Answer Correct Answer: A) Kg. 9. ..... is a force that acts in opposition to movement. A) None of these. B) Friction. C) Gravity. D) Magnetism. Show Answer Correct Answer: B) Friction. 10. When you tell the direction and speed of an object, you give its A) Motion. B) Velocity. C) Acceleration. D) Mass. Show Answer Correct Answer: B) Velocity. 11. According to Newton's third law, if you push gently on something, it will push A) Gently on something else. B) On you only if you aren't moving. C) Gently on you. D) Downward. Show Answer Correct Answer: C) Gently on you. 12. When a car at high speed makes a sharp turn, the driver in a car tends to get thrown to the side opposite to the turn. This is due to the A) Inertia of motion. B) Inertia of time. C) Inertia of rest. D) Inertia of direction. Show Answer Correct Answer: A) Inertia of motion. 13. An object of mass 2 kg is sliding with a constant velocity of 4 ms-1 on a frictionless horizontal table. The force required to keep the object moving with the same velocity is A) 32 N. B) 0 N. C) 2 N. D) 8 N. Show Answer Correct Answer: B) 0 N. 14. DEFINE MOMENTUM A) THE PRODUCT MASS AND VELOCITY IS CALLED MOMENTUM. B) FORCE THAT IS MOVING. C) BOTH OF THESE. D) ALL OF THESE. Show Answer Correct Answer: A) THE PRODUCT MASS AND VELOCITY IS CALLED MOMENTUM. 15. Equal and opposite forces acting on a body which do not change its state of rest or motion are called. A) Like paralle forces. B) Unlike parallel forces. C) Balanced forces. D) All of the above. Show Answer Correct Answer: C) Balanced forces. 16. Forces do not occur in pairs. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 17. To every action there is equal and opposite reaction acting on two different bodies A) First law of motion. B) Third law of motion. C) Second law of motion. D) Law of inertia. Show Answer Correct Answer: B) Third law of motion. 18. A body in uniform motion will remain in uniform motion if we apply ..... forces. A) Either balanced or unbalanced. B) None of these. C) Unbalanced. D) Balanced. Show Answer Correct Answer: D) Balanced. 19. Which has more momentum:a car stopped at a red light or a bike moving at 15 mph? A) Car. B) Bike. C) They are equal. D) Cannot determine using the info provided. Show Answer Correct Answer: B) Bike. 20. The S.I. unit of momentum is ..... A) Kgm/s$^{2}$. B) Kgm. C) Kgm/s. D) Kg$^{2}$/m. Show Answer Correct Answer: C) Kgm/s. 21. A body of mass 3 Kg retards uniformly from 40 m/s to 10 m/s in 10 s. Find the retarding force. A) 10 N. B) 9 N. C) 8 N. D) 7 N. Show Answer Correct Answer: B) 9 N. 22. A 20 kg bike accelerates at 10 m/s$^{2}$. what was the force? A) 25 Newtons. B) 20 Newtons. C) 200 Newtons. D) 10 Newtons. Show Answer Correct Answer: C) 200 Newtons. 23. Rate of change of momentum is directly proportional to the force applied on the object in the direction of the force this one is Newton's A) First law of motion. B) Second law of motion. C) Third law of motion. D) 4th law of motion. Show Answer Correct Answer: B) Second law of motion. 24. During football match, the ball shot towards the goal struck the defender's foot at the speed of 10 m/s and it bounces back at 20 m/s. if the time of impact was 0.2 s and mass of the ball 1 kg, then average force exerted by defender on the ball is A) 150 N. B) 35 N. C) 75 N. D) 50 N. Show Answer Correct Answer: A) 150 N. 25. When the speed of an object is doubled, its momentum A) Remains unchanged in accord with the conservation of momentum. B) Doubles. C) Quadruplets. D) Decreases. Show Answer Correct Answer: B) Doubles. ← 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