This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Momentum is ..... A) Product of mass and inertia. B) Product of mass and force. C) Product of mass and velocity. D) Stormbreaker. Show Answer Correct Answer: C) Product of mass and velocity. 2. Force is equal to A) Mass*acceleration. B) Mass*velocity. C) Distance*time. D) None of the above. Show Answer Correct Answer: A) Mass*acceleration. 3. An object is said to be unbalanced when A) It is a hulk smash. B) The net force is 0. C) It is a push or a pull. D) The net force is not 0. E) None of the above. Show Answer Correct Answer: D) The net force is not 0. 4. Newton used the word 'mass in motion' to represent A) Linear momentum. B) Inertia of motion. C) Velocity. D) Inertia at rest. Show Answer Correct Answer: A) Linear momentum. 5. What is Newtons 1st law of motion? A) Force= Mass multiplied by acceleration. B) An object at rest stays at rest unless acted on an unbalanced force. C) For every action there is a equal and opposite re-action. D) Law of gravity. Show Answer Correct Answer: B) An object at rest stays at rest unless acted on an unbalanced force. 6. Distance traveled by a car in first 5 mins is the same as the distance it covers in next 5 mins which is same as the distance covered by it in next 5 mins. the car is executing A) Non-uniform motion. B) Uniform Motion. C) Uniform Circular Motion. D) None of these. Show Answer Correct Answer: B) Uniform Motion. 7. If a man jumps out from a boat, the boat moves A) Forward. B) Sidewards. C) Backwards. D) Downwards. Show Answer Correct Answer: C) Backwards. 8. Which would require a greater force accelerating a 2 kg mass at 5 metre per second square or a 4 kg mass at 2 metre per second square? A) F1 is greater than F2. B) F2 is greater than F1. C) F1 and F2 equal in magnitude. D) None of the above. Show Answer Correct Answer: A) F1 is greater than F2. 9. If I threw a rock in space what force would be acting against it? A) Gravity. B) Friction. C) Electromagnetism. D) Nothing. Show Answer Correct Answer: D) Nothing. 10. If you multiple velocity by mass you will get the object's ..... A) Acceleration. B) Force. C) Speed. D) Momentum. Show Answer Correct Answer: D) Momentum. 11. A body of mass 500 g is resting on a frictionless table. calculate the acceleration of the body when acted upon by a force of 0.01 N. A) 0.03 m/s$^{2}$. B) 0.01 m/s$^{2}$. C) 0.04 m/s$^{2}$. D) 0.02 m/s$^{2}$. Show Answer Correct Answer: D) 0.02 m/s$^{2}$. 12. Calculate the momentum of a bullet of 20 gram when it is fired from a gun with a velocity of hundred metre per second A) 5 kg metre per second. B) 2 kg metre per second. C) 3 kg metre per second. D) 5 gram metre per second. Show Answer Correct Answer: B) 2 kg metre per second. 13. A motorcar is moving with a velocity 108km/hr and it takes 4 seconds to stop after the break is applied. Calculate the force exerted by the beaks on the motorcar if it's mass along the passenger is 1000kg. A) -7850 kg m/s2. B) -7500 kg m/s 2. C) -8000 kg m/s 2. D) None of the above. Show Answer Correct Answer: B) -7500 kg m/s 2. 14. Friction always acts on the ..... direction A) Same. B) Opposite. C) Adjacent. D) Corresponding. Show Answer Correct Answer: B) Opposite. 15. The principle of conservation of linear momentum states that the linear momentum of a system A) Can be changed by internal force. B) Can be changed when internal forces are extremely high. C) Can be changed even by the slightest unbalanced external force. D) Always remain conserved. Show Answer Correct Answer: C) Can be changed even by the slightest unbalanced external force. 16. Which force produces the change in motion? A) Balanced force. B) Gravitational force. C) Unbalanced force. D) Frictional force. Show Answer Correct Answer: C) Unbalanced force. 17. What factor will slow down an object moving through space? A) Air resistance. B) Friction. C) Another object. D) Gravity. Show Answer Correct Answer: C) Another object. 18. A force of 10N acts on a body of mass 20KG for 10 seconds. The change produced in momentum is given by: A) 5 KG m/s. B) 100 KG m/s. C) 200 KG m/s. D) 2000 KG m/s. Show Answer Correct Answer: B) 100 KG m/s. 19. The acceleration of object is A) Inversely proportional to its mass. B) Directly proportional to the applied force. C) Resisted by inertia. D) All of the above. Show Answer Correct Answer: D) All of the above. 20. WHICH OF THE FOLLOWING IS NOT AN APPLICATION OF CONSERVATION OF LINEAR MOMENTUM? A) WHILE FIRING A BULLET, THE GUN MUST BE HELD TIGHT TO THE SHOULDER. B) WHEN A MAN JUMPS FROM A BOAT TO THE SHORE. C) A ROCKET EXPLODES ON MIDWAY FROM THE GROUND. D) A RUBBER BALL REBOUNDS WHEN STRUCK AGAINST A HARD FLOOR. Show Answer Correct Answer: C) A ROCKET EXPLODES ON MIDWAY FROM THE GROUND. 21. An object is said to be balanced when A) It is a hulk smash. B) It is a push or a pull. C) The net force is 0. D) The net force is not 0. E) None of the above. Show Answer Correct Answer: C) The net force is 0. 22. Momentum is represented by A) P. B) P. C) M. D) K. Show Answer Correct Answer: A) P. 23. Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? A) Feathers. B) Iron. C) Same. D) Depends on their friction. Show Answer Correct Answer: C) Same. 24. The inertia of a moving object depends on A) Mass of the object. B) Momentum of the object. C) Speed of the object. D) Shape of the object. Show Answer Correct Answer: A) Mass of the object. 25. What is the unit of Force? A) M/s. B) Newton (N). C) JOULES (J). D) Pounds (lbs). Show Answer Correct Answer: B) Newton (N). ← 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 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