This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Force And Laws Of Motion > Class 9 Science Chapter 9 Force And Laws Of Motion – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Acceleration is due to a force put on an objects mass. A) 1 stem. B) Pear. C) An offer. D) None of the above. Show Answer Correct Answer: B) Pear. 2. What is Newton's First Law known as? The Law of A) Mass. B) Gravity. C) Inertia. D) Friction. Show Answer Correct Answer: C) Inertia. 3. A cup of coffee sits on the dashboard of an automobile. The car goes around a sharp curve. Even though you hold the cup still, coffee splashes out. This is explained due to A) Inertia. B) Gravity. C) Density. D) Friction. Show Answer Correct Answer: A) Inertia. 4. Action and reaction forces A) Act on the same body. B) Act on different bodies. C) Act in same direction. D) Both I and III. Show Answer Correct Answer: A) Act on the same body. 5. Momentum is defined as the product of: A) Mass and acceleration. B) Mass and velocity. C) Force and time. D) Velocity and time. Show Answer Correct Answer: B) Mass and velocity. 6. Which has more mass, a kilogram of feathers or a kilogram of iron? A) Neither. B) The feathers. C) The iron. D) It depends. Show Answer Correct Answer: A) Neither. 7. Speed plus direction: A) Inertia. B) Velocity. C) Acceleration. D) Force. Show Answer Correct Answer: B) Velocity. 8. Which of the following objects has the least acceleration? A) An empty shopping cart pushed with a light force. B) A full shopping cart pushed with a lightforce. C) A full shopping cart pushed with a hard force. D) An empty shopping cart pushed with a hard force. Show Answer Correct Answer: B) A full shopping cart pushed with a lightforce. 9. What is the formula for momentum? A) Distance/ Speed = Momentum. B) Mass x Speed = Momentum. C) Mass x Velocity = Momentum. D) None of the above. Show Answer Correct Answer: C) Mass x Velocity = Momentum. 10. Inertia is defined as ..... A) Property of mass to change the motion. B) Property of mass to accelerate. C) Property of mass to remain at rest. D) None of the option. Show Answer Correct Answer: B) Property of mass to accelerate. 11. A karate player breaks the pile of the tiles or bricks with a single blow. Which law is applied here? A) First law. B) Second law. C) Third law. D) None of the above. Show Answer Correct Answer: B) Second law. 12. When a carpet is beaten with a stick, dust particle comes out. This phenomenon is an example of ..... law of motion. A) 1. B) 2. C) 3. D) NONE OF THESE. Show Answer Correct Answer: A) 1. 13. The property of a body to resist any change in its state of motion is known as: A) Force. B) Momentum. C) Acceleration. D) Inertia. Show Answer Correct Answer: D) Inertia. 14. Inertia depends on ..... A) Weight. B) None of these. C) Mass. D) Acceleration. Show Answer Correct Answer: C) Mass. 15. A man wearing a bullet-proof vest stands on roller skates. The total mass is 80 kg. A bullet of mass 20 g is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is then the velocity of the man? A) (d) 0 m/s. B) (b) 0.1 m/s. C) C) 0.01 m/s. D) (a) 1 m/s. Show Answer Correct Answer: B) (b) 0.1 m/s. 16. MOMENTUM FORMULA A) P=mv. B) M=vm. C) V-PM. D) All of these. Show Answer Correct Answer: A) P=mv. 17. Which law explains how rockets are launched into space? A) Newton's Third Law of Motion. B) Newton's Fourth Law of Motion. C) Newton's First Law of Motion. D) Newton's Second Law of Motion. Show Answer Correct Answer: A) Newton's Third Law of Motion. 18. According to second law of motion "the rate of change of momentum is directly proportional to ..... applied" . A) MASS. B) VELOCITY. C) FORCE. D) NONE OF THESE. Show Answer Correct Answer: C) FORCE. 19. Which of the following phenomenon is NOT an example of Law of Inertia? A) When you shake a branch the leaves get detached. B) Wearing the seat belt while driving a car to avoid injuries. C) Local trains and metro coaches have hanging straps for the standing passengers to grab. D) Rocket's burning flame which pushes into space. Show Answer Correct Answer: D) Rocket's burning flame which pushes into space. 20. If a net force of 5 N was constantly applied on 200 g object at rest, how long will it take to raise its velocity to 150 m/s? A) 8 sec. B) 6 sec. C) 2 sec. D) 4 sec. Show Answer Correct Answer: B) 6 sec. 21. In which direction and with how much force will an object move if you push to the left with 15N of force and your friend pushes to the right with 5N of force? A) Right with 10N of force. B) Down with 5N of force. C) Left with 10N of force. D) Up with 10N of force. Show Answer Correct Answer: C) Left with 10N of force. 22. Stacy is rowing a boat. She wants the boat to move forward. According to Newton's Third Law, in which direction should she move her paddle in the water? A) Backwards. B) Above her head. C) Forward. D) East. Show Answer Correct Answer: A) Backwards. 23. When a space shuttle was launched, the astronauts onboard experienced an acceleration of 29.0 m/s$^{2}$. If one of the astronauts had a mass of 60.0 kg, what net force in newtons did the astronaut experience? A) 1740 N. B) 2.07 N. C) 1740 m/s$^{2}$. D) .48 N. Show Answer Correct Answer: A) 1740 N. 24. Friction is a force that always acts A) Perpendicular to an object's motion. B) Opposite to an object's motion. C) In the same direction as an object's motion. D) Parallel to the object's motion. Show Answer Correct Answer: B) Opposite to an object's motion. 25. The gravity between two objects depends on the distance and ..... A) Momentum. B) Volume. C) Mass. D) Magnetic attraction. Show Answer Correct Answer: C) Mass. 26. An object at rest will ..... if no outside forces are applied. A) Stay at rest. B) Increase velocity. C) Decrease mass. D) Fall to the ground. Show Answer Correct Answer: A) Stay at rest. 27. MASS OF THE OBJECT IS DOUBLED THEN FORCE OF THE OBJECT IS ..... A) DOUBLED. B) BECOMES HALF. C) QUARTER. D) NONE OF THESE. Show Answer Correct Answer: A) DOUBLED. 28. THERE ARE 3 SOLID BALLS MADE UP OF ALUMINUM, STEEL AND WOOD OF SAME SHAPE AND VOLUME. WHICH OF THEM HAVE HIGHEST INERTIA? A) WOOD. B) STEEL. C) ALUMINIUM. D) ALL OF THESE. Show Answer Correct Answer: B) STEEL. 29. THE MASSES OF TWO BODIES ARE IN RATIO 5:6 AND THEIR VELOCITIES ARE IN RATIO 1:2. THEN THEIR LINEAR MOMENTUM WILL BE IN THE RATIO A) 5:12. B) 5:6. C) 1:2. D) 12:5. Show Answer Correct Answer: A) 5:12. 30. The ratio of speed to the magnitude of velocity when the body is moving in one direction is A) Equal to one. B) Greater than or equal to one. C) Less than one. D) Greater than one. Show Answer Correct Answer: A) Equal to one. 31. 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. 32. 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. 33. 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. 34. Newton used the word 'mass in motion' to represent A) Inertia at rest. B) Linear momentum. C) Velocity. D) Inertia of motion. Show Answer Correct Answer: B) Linear momentum. 35. 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. 36. 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. 37. 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. 38. If I threw a rock in space what force would be acting against it? A) Gravity. B) Friction. C) Nothing. D) Electromagnetism. Show Answer Correct Answer: C) Nothing. 39. If you multiple velocity by mass you will get the object's ..... A) Momentum. B) Acceleration. C) Speed. D) Force. Show Answer Correct Answer: A) Momentum. 40. 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) 0.02 m/s$^{2}$. C) 0.01 m/s$^{2}$. D) 0.04 m/s$^{2}$. Show Answer Correct Answer: B) 0.02 m/s$^{2}$. 41. 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) 2 kg metre per second. B) 5 kg metre per second. C) 3 kg metre per second. D) 5 gram metre per second. Show Answer Correct Answer: A) 2 kg metre per second. 42. 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. 43. Friction always acts on the ..... direction A) Same. B) Adjacent. C) Opposite. D) Corresponding. Show Answer Correct Answer: C) Opposite. 44. 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) Always remain conserved. D) Can be changed even by the slightest unbalanced external force. Show Answer Correct Answer: D) Can be changed even by the slightest unbalanced external force. 45. Which of the following statement is correct regarding velocity and speed of a moving body? A) Speed of a moving body is its velocity in a given direction. B) Speed of a moving body is always higher than its velocity. C) Velocity of a moving body is always higher than its speed. D) Velocity of a moving body is its speed in a given direction. Show Answer Correct Answer: D) Velocity of a moving body is its speed in a given direction. 46. What factor will slow down an object moving through space? A) Air resistance. B) Gravity. C) Another object. D) Friction. Show Answer Correct Answer: C) Another object. 47. 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. 48. 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. 49. 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. 50. 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. 51. A car of mass 1000 kg is moving with a velocity of 10 m/s. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of 25 s will be: A) 25 m/s. B) 10 m/s. C) 40 m/s. D) 250 m/s. Show Answer Correct Answer: B) 10 m/s. 52. Momentum is represented by A) P. B) P. C) K. D) M. Show Answer Correct Answer: A) P. 53. Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? A) Same. B) Depends on their friction. C) Iron. D) Feathers. Show Answer Correct Answer: A) Same. 54. The inertia of a moving object depends on A) Shape of the object. B) Speed of the object. C) Momentum of the object. D) Mass of the object. Show Answer Correct Answer: D) Mass of the object. 55. What is the unit of Force? A) Newton (N). B) M/s. C) Pounds (lbs). D) JOULES (J). Show Answer Correct Answer: A) Newton (N). 56. A boy of mass 50 Kg running at 5 m/s jumps on to a 20Kg trolley travelling in the same direction at 1.5 m/s. What is the common velocity? A) 3 m/s. B) 4 m/s. C) 3.5 m/s. D) 4.5 m/s. Show Answer Correct Answer: B) 4 m/s. 57. If the mass of a body is doubled and its velocity becomes half, then the linear momentum of the body will A) Become half. B) Become double. C) Become four times. D) Remain same. Show Answer Correct Answer: D) Remain same. 58. Balanced forces do not change the state of motion of an object. A) True. B) False. C) None of these. D) Don't Know. Show Answer Correct Answer: A) True. 59. What is the tendency of a body to resisist change in it's state of motion called? A) Friction. B) Inertia. C) Momentum. D) Gravitation. Show Answer Correct Answer: B) Inertia. 60. A high school student hits a nail with a hammer. During the collision, there is a force A) On the nail but not on the hammer. B) On the nail and also on the hammer. C) On the hammer but not on the nail. D) On neither. Show Answer Correct Answer: B) On the nail and also on the hammer. ← PreviousNext →Related QuizzesScience QuizzesClass 9 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 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 7 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books