This quiz works best with JavaScript enabled. Home > Cbse > Class 8 > Science > Friction > Class 8 Science Chapter 12 Friction – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 12 Friction Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Sliding friction is smaller than: A) Rolling friction. B) Static friction. C) Fluid friction. D) None of the above. Show Answer Correct Answer: B) Static friction. 2. A man's boat was stuck on shore when the tide went out. So, he began pushing his boat across the mud to get to the water. Also, the coefficient of friction among his wooden boat and the mud is $\mu$= 0.400. Furthermore, the mass of the boat is 50.0 kg. Then find the magnitude of the force of friction acting on the boat? A) 200 N. B) 196 N. C) 212 N. D) 212.65 N. Show Answer Correct Answer: B) 196 N. 3. The amount of friction depends on the weight of the objects A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 4. Friction depends upon: A) Smoothness of surface. B) Roughness of surface. C) Inclination of surface. D) All of the above. Show Answer Correct Answer: D) All of the above. 5. To and fro motion of an object is called A) Translatory. B) Rectilinear. C) Oscillatory. D) Rotatory. Show Answer Correct Answer: C) Oscillatory. 6. What kind of substances are known as lubricants? A) Increase friction. B) Decrease friction. C) Increase or decrease friction. D) None of these. Show Answer Correct Answer: B) Decrease friction. 7. This type of force resist motion between two surfaces that are in contact with each other A) Contact. B) Gravity. C) Friction. D) None of the above. Show Answer Correct Answer: C) Friction. 8. The bus is travelling and the car is travelling. Who will feel more friction A) Car. B) Bus. C) Both same. D) Dont ask these questions. Show Answer Correct Answer: A) Car. 9. Sliding friction is more than static friction A) True. B) FalseTagst/f. C) All the above. D) None of the above. Show Answer Correct Answer: B) FalseTagst/f. 10. What type of friction affects a moving car while driving? A) Fluid friction. B) Sliding friction. C) Rolling friction. D) Fluid and rolling friction. Show Answer Correct Answer: D) Fluid and rolling friction. 11. Applying WD-40 to a squeaky door turns ..... friction into ..... friction. A) Sliding $\rightarrow$ fluid. B) Sliding $\rightarrow$ rolling. C) Rolling $\rightarrow$ sliding. D) Static $\rightarrow$ rolling. Show Answer Correct Answer: A) Sliding $\rightarrow$ fluid. 12. Which of the following friction is least? A) Static Friction. B) Sliding Friction. C) Rolling Friction. D) None. Show Answer Correct Answer: C) Rolling Friction. 13. Which of the following activity is easier to perform on a 10kg drum? A) Dragging a drum,. B) Lifting a drum. C) Rolling a drum. D) All needs same effort. Show Answer Correct Answer: C) Rolling a drum. 14. If the irregularities on two surfaces are less, the friction between them will be A) More. B) Less. C) None of the above. D) None of the above. Show Answer Correct Answer: B) Less. 15. If limiting friction of a body is 60 N and force applied is 62 N then the body will A) Doesn't move. B) Not move. C) Moves slowly. D) Move. Show Answer Correct Answer: A) Doesn't move. 16. Walking is an example of which type of friction? A) Fluid. B) Static. C) Sliding. D) Rolling. Show Answer Correct Answer: B) Static. 17. Friction depends on the A) Smoothness of surface. B) Atmosphere. C) Nature of surface. D) Roughness of surface. Show Answer Correct Answer: C) Nature of surface. 18. Friction is a force that ..... the motion of an object. A) Generates. B) Opposes. C) Creates. D) Adds to. Show Answer Correct Answer: B) Opposes. 19. Four children were asked to arrange forces due to rolling, static and sliding frictions in an increasing order. Their arrangements are given below. Choose the correct arrangement. A) Rolling, Static, Sliding. B) Rolling, sliding, static. C) Static, Rolling, Sliding. D) Sliding, Static, Rolling. Show Answer Correct Answer: B) Rolling, sliding, static. 20. Which of the following is a common effect of friction on moving objects? A) Increased speed. B) Heat generation. C) Decreased weight. D) Change in color. Show Answer Correct Answer: B) Heat generation. 21. Effects of friction A) Heat. B) Sometimes light. C) Gravity. D) Both heat and light. Show Answer Correct Answer: D) Both heat and light. 22. Which one of these characteristics does a smooth surface has? A) Less frictional force. B) More frictional force. C) None of these. D) Both a and b. Show Answer Correct Answer: A) Less frictional force. 23. Friction always ..... any relative motion between the two surfaces that are in contact with each other A) Attracts. B) Equalizes. C) Opposes. D) All of the above. Show Answer Correct Answer: C) Opposes. 24. Friction opposes A) Kinetic force. B) Motion. C) Sliding motion. D) Relative motion. Show Answer Correct Answer: B) Motion. 25. What type of friction will you see when air or liquid slows an objects movement? A) Static. B) Sliding. C) Rolling. D) Fluid. Show Answer Correct Answer: D) Fluid. 26. True or False:objects that are smooth have LESS friction than objects that are rough A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 27. Causes of friction A) Sliding force. B) Rolling force. C) Static force. D) All of the above. Show Answer Correct Answer: D) All of the above. 28. When two solid surfaces slide over each other. A) Static friction. B) Rolling friction. C) Fluid friction. D) Sliding friction. Show Answer Correct Answer: D) Sliding friction. 29. What does friction produce? A) Color. B) Sound. C) Heat. D) None of the above. Show Answer Correct Answer: C) Heat. 30. What is the unit for FORCE? A) M/s (meters per second). B) Lbs (pounds). C) G (grams). D) N (Newtons). Show Answer Correct Answer: D) N (Newtons). 31. Sharks have ..... bodies, which help them to move easily in water A) Narrow. B) Longish. C) Streamlined. D) Rounded. Show Answer Correct Answer: C) Streamlined. 32. The shape of an aeroplane is like a A) Dog. B) Bird. C) Car. D) All of these. Show Answer Correct Answer: B) Bird. 33. Friction produces heat A) True. B) Falsetagst/F. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 34. Which of the following is maximum? A) Static Friction. B) Sliding Friction. C) Rolling Friction. D) None. Show Answer Correct Answer: A) Static Friction. 35. The force that acts in the opposite direction of motion when two surfaces come in contact. A) Kinetic. B) Friction. C) Force. D) Static. Show Answer Correct Answer: B) Friction. 36. The amount of friction depends on the weight of the objects pressing together. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 37. A toy car released with the same initial speed will travel farthest on A) Cement surface. B) Muddy surface. C) Brick surface. D) Polished marble surface. Show Answer Correct Answer: D) Polished marble surface. 38. Sliding friction is when two ..... surfaces slide over one another. A) Liquid. B) Oil. C) Solid. D) None of the above. Show Answer Correct Answer: C) Solid. 39. What effect does increasing the surface area of contact have on friction? A) No effect. B) Decreases friction. C) Depends on the material. D) Increases friction. Show Answer Correct Answer: D) Increases friction. 40. 60 Second is equal to A) 60 minutes. B) 1 minute. C) 60 seconds. D) 1 hour. Show Answer Correct Answer: B) 1 minute. 41. Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play A) Only if one of the two objects is liquid. B) Only if the objects are solid. C) Irrespective of whether the objects are solid, liquid or gaseous. D) Only if one of the two objects is gaseous. Show Answer Correct Answer: C) Irrespective of whether the objects are solid, liquid or gaseous. 42. Rolling friction is smaller than? A) Sliding friction. B) Static friction. C) Fluid friction. D) All of the above. Show Answer Correct Answer: D) All of the above. 43. Friction is an example of ..... A) Contact force. B) Non contact force. C) Both of these. D) None of these. Show Answer Correct Answer: A) Contact force. 44. Unit for displacement is A) Metres. B) Second. C) Kg. D) Letter. Show Answer Correct Answer: A) Metres. 45. Frictional force depends on ..... A) Surface area in contact. B) Roughness of surface. C) Both a and b. D) None of the above. Show Answer Correct Answer: C) Both a and b. 46. If some force is applied to a pencil, it rolls on the floor below it. What type of friction is observed? A) Static Friction. B) Rolling Friction. C) No Friction is observed. D) Sliding Friction. Show Answer Correct Answer: B) Rolling Friction. 47. Friction can be reduced by using A) Oil. B) Grease. C) Powder. D) All of these. Show Answer Correct Answer: D) All of these. 48. Which of the following is an example of friction that is helpful? A) Brakes used on a bike. B) Tires from a car on the road. C) Tread on the bottom of your shoe. D) All are examples that are helpful. Show Answer Correct Answer: D) All are examples that are helpful. 49. The direction of force of friction is always ..... to the direction of motion A) Same. B) Opposite. C) Unchanged. D) None of these. Show Answer Correct Answer: B) Opposite. 50. How can friction be helpful? A) Erosion of topsoil. B) Wearing down of engine parts. C) Allows brakes of a car to operate. D) Holes in socks. Show Answer Correct Answer: C) Allows brakes of a car to operate. 51. Friction is an evil because A) Cannot be known. B) It does not help us in any way. C) It produces heat. D) It wears out the surfaces which it acts upon. Show Answer Correct Answer: D) It wears out the surfaces which it acts upon. 52. Can Friction be an opposing force? A) Yes, it slows objects down until they stop. B) No, it can't stop objects. C) Sometimes if the object has no mass. D) None of the above. Show Answer Correct Answer: A) Yes, it slows objects down until they stop. 53. The force of friction depends upon A) Nature of surface of contact. B) Material of objects in contact. C) Both 'a' and 'b'. D) None of the above. Show Answer Correct Answer: C) Both 'a' and 'b'. 54. Greater friction causes ..... A) An increase in speed. B) A decrease in speed. C) Both of these. D) Neither increase or decrease. Show Answer Correct Answer: B) A decrease in speed. 55. Which of the following is responsible for wearing out of bicycle tyres? A) (d) Electrostatic force. B) A) Muscular force. C) (c) Frictional force. D) (b) Magnetic force. Show Answer Correct Answer: C) (c) Frictional force. 56. Which of the following is an example of friction that is harmful? A) Pencil marking on paper. B) Engine parts wearing out. C) Sand placed on ice in the winter. D) Using an eraser to erase marks. Show Answer Correct Answer: B) Engine parts wearing out. 57. Another name for specially shaped bodies to reduce friction ..... A) Streamline flow. B) Friction reducing bodies. C) Streamlined bodies. D) Air cutters. Show Answer Correct Answer: C) Streamlined bodies. 58. Motion of object in straight line is called A) Rotatory. B) Velocity. C) Oscillator Re. D) Translatory. Show Answer Correct Answer: D) Translatory. 59. Which of the following is not a smooth surface? A) Glazed tiles. B) Surface of wet soap. C) Surface of mirror. D) Surface of tyres. Show Answer Correct Answer: D) Surface of tyres. 60. Displacement by time A) Velocity. B) Acceleration. C) Speed. D) Force. Show Answer Correct Answer: A) Velocity. 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