This quiz works best with JavaScript enabled. Home > Cbse > Class 8 > Science > Friction > Class 8 Science Chapter 12 Friction – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 8 Science Chapter 12 Friction Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A football player will use which items to increase friction while playing? A) Cleats. B) Jersey. C) Gloves. D) Shoulder pads. E) Cleats and gloves. Show Answer Correct Answer: E) Cleats and gloves. 2. What is the limiting force of friction? A) The force which limits friction. B) Motion. C) The maximum value of friction between two surfaces. D) None of the above. Show Answer Correct Answer: C) The maximum value of friction between two surfaces. 3. Friction due to fluids is called A) Friction. B) Force. C) DragTagsmcq. D) Pressure. Show Answer Correct Answer: C) DragTagsmcq. 4. What are 2 factors that determine the amount of friction between 2 objects? A) Force and roughness between surfaces. B) Hills and valleys and how smooth or rough the surface is. C) Amount of force and amount of surface the comes in contact. D) The force and the weight exerted on the surfaces. Show Answer Correct Answer: A) Force and roughness between surfaces. 5. Which of the following has a streamline body? A) Jeep. B) Truck. C) Eagle. D) Dog. Show Answer Correct Answer: C) Eagle. 6. Fluid friction depends on A) The speed of the object. B) Shape of the object. C) The nature of the fluid. D) All of these. Show Answer Correct Answer: D) All of these. 7. When two surfaces rub, the irregularities of one surface get caught on those of the other surface? A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 8. Can friction be entirely eliminated? A) Yes, It can be. B) No, It can't be. C) All the above. D) None of the above. Show Answer Correct Answer: B) No, It can't be. 9. ..... helps reduce friction A) Adding spikes to soles of shoes. B) Using anti-skid tiles on the bathroom floor. C) Spreading sand/gravel on icy roads. D) Smearing oil on moving parts of machines. Show Answer Correct Answer: D) Smearing oil on moving parts of machines. 10. Wheels on a skateboard most likely experience ..... A) Rolling Friction. B) Static Friction. C) Sliding Friction. D) Fluid Friction. Show Answer Correct Answer: A) Rolling Friction. 11. When there is friction, the energy of an object's motion is converted into ..... energy A) Friction. B) Heat. C) Kinetic. D) Stronger. Show Answer Correct Answer: B) Heat. 12. Which of the following materials is commonly used as a lubricant to reduce friction? A) Oil. B) Sand. C) Wood. D) Plastic. Show Answer Correct Answer: A) Oil. 13. Without friction, an object in motion would never stop. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. Which of these explains how friction affects the speed of a moving object? A) Friction pushes objects to higher speeds. B) Friction only affects speed in outer space. C) Friction can slow down objects until they stop. D) None of the above. Show Answer Correct Answer: C) Friction can slow down objects until they stop. 15. Force of friction results in ..... A) Wear. B) Tear. C) Wear and tear. D) None of the above. Show Answer Correct Answer: C) Wear and tear. 16. How can friction be reduced? A) Increase force applied to objects in contact. B) Make surfaces rougher. C) Increase the weight of each object. D) Add a lubricant. Show Answer Correct Answer: D) Add a lubricant. 17. A type of friction that occurs when air pushes against a moving object causing it to decelerate. A) GRAVITY. B) VELOCITY. C) AIR RESISTANCE. D) Surface Area. Show Answer Correct Answer: C) AIR RESISTANCE. 18. Static friction is less than A) Sliding friction. B) Rolling friction. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: D) None of these. 19. In which type of friction "the static friction is equal to applied force" ? A) Rolling friction. B) Static friction. C) Sliding friction. D) Fluid friction. Show Answer Correct Answer: B) Static friction. 20. Which of these surfaces would offer the least friction? A) Sand paper. B) Velvet paper. C) Wax paper. D) Normal paper. Show Answer Correct Answer: C) Wax paper. 21. When objects move through fluids, to overcome the friction of the fluids they ..... energy in the process. A) Gain. B) Lose. C) Stay the same. D) None of the above. Show Answer Correct Answer: B) Lose. 22. There are four objects resting on a wooden board. When pushed lightly, which object is most likely to roll off the board? A) Flat eraser. B) Bent paper clip. C) Round ball. D) Wooden cube. Show Answer Correct Answer: C) Round ball. 23. Which of the following surface will have least friction? A) Cardboard. B) Paper. C) Glass. D) Wood. Show Answer Correct Answer: C) Glass. 24. Complete the sentence. Friction always ..... A) Helps the motion. B) Opposes the motion. C) Both of these. D) None of these. Show Answer Correct Answer: B) Opposes the motion. 25. Type of friction shown by a roller coaster is A) Rolling drag. B) Air resistance. C) Rolling resistance. D) Both air resistance and air drag. Show Answer Correct Answer: D) Both air resistance and air drag. 26. Which is a/ are streamlined object? A) Aeroplane. B) Boat. C) Ship. D) All the above. Show Answer Correct Answer: D) All the above. 27. Which of the following materials is likely to have least friction A) Wood. B) Glass. C) Cardboard. D) Paper. Show Answer Correct Answer: B) Glass. 28. Which of the following is a method to increase friction? A) Increasing surface roughness. B) Using a lubricant. C) Using smooth surfaces. D) Reducing weight. Show Answer Correct Answer: A) Increasing surface roughness. 29. Friction decreases with increase in the smoothness of the surface. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 30. What is the unit called that measures force? A) Meter. B) Newton. C) Kilogram. D) Weight. Show Answer Correct Answer: B) Newton. 31. Friction depends on the nature of the surface in contact A) True. B) Falsetagst/F. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 32. When limiting friction is greater than force applied A) Net force becomes limiting friction + force applied. B) The body moves slightly. C) Force applied becomes 0. D) The body doesn't move. Show Answer Correct Answer: D) The body doesn't move. 33. Tyres are treaded to A) Decrease friction. B) Increase friction. C) Both a & b. D) None. Show Answer Correct Answer: B) Increase friction. 34. The factors on which friction depends A) Nature of the surfaces. B) How hard the objects are pressed together. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: C) Both (a) and (b). 35. What is the direction of force of friction acting on a moving object? A) Opposite to the direction of moving objects. B) The same direction of the moving objects. C) Both are correct. D) None of the above. Show Answer Correct Answer: A) Opposite to the direction of moving objects. 36. The force of friction opposes the relative motion between two surfaces. A) True. B) False. C) Cannot be known. D) None of the above. Show Answer Correct Answer: A) True. 37. Fluid friction is also known as A) Pull. B) Push. C) Drag. D) Drum. Show Answer Correct Answer: C) Drag. 38. How is motor oil a real-world application related to friction? A) Motor oil is greasy. B) Motor oil increases the sliding friction in engine parts. C) Motor oil tastes bad. D) Motor oil decreases the friction between engine parts. Show Answer Correct Answer: D) Motor oil decreases the friction between engine parts. 39. Only solids can produce friction A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 40. Smooth surfaces do not have any irregularities in them. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 41. The frictional force of an object in a fluid depends upon its ..... with respect to the fluid. A) Mass. B) Volume. C) Speed. D) Weight. Show Answer Correct Answer: C) Speed. 42. The rouugher the surface, the faster an object will travel over the surface A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 43. The object which will show most less air resistance A) Pin. B) Cone shaped paper. C) Flat paper. D) Round shaped object. Show Answer Correct Answer: A) Pin. 44. Who invented friction A) Ada Lovelace. B) Galileo Galilei. C) Leonardo da Vinci. D) Rosalind Franklin. Show Answer Correct Answer: C) Leonardo da Vinci. 45. What type of friction will you have when two objects slide against each other? A) Static. B) Sliding. C) Rolling. D) Fluid. Show Answer Correct Answer: B) Sliding. 46. On which surface will a toy car travel the furthest? A) Carpet. B) Polished Wood. C) Ice. D) None of the above. Show Answer Correct Answer: C) Ice. 47. The frictional force exerted by fluids is called- A) Pull. B) Drag. C) Rolling friction. D) Fluid Force. Show Answer Correct Answer: B) Drag. 48. How many types of frictions are there? A) 3. B) 1. C) 4. D) 2. Show Answer Correct Answer: C) 4. 49. Friction helps you write on a paper or black board. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 50. Sliding friction is ..... than / to rolling friction A) Smaller. B) Greater. C) Equal. D) None of the above. Show Answer Correct Answer: B) Greater. 51. Movers slide a box down the ramp of a truck.What helps slow the box as it slides to the bottom of the ramp? A) Magnetism. B) Friction. C) Inertia. D) Gravity. Show Answer Correct Answer: B) Friction. 52. On rough surface friction is A) More. B) Less. C) Least. D) None of the above. Show Answer Correct Answer: A) More. 53. What direction does friction act relative to motion? A) In the same direction. B) In the opposite direction. C) Need more information. D) Depends on the force. Show Answer Correct Answer: B) In the opposite direction. 54. Distance travelled in unit time is A) Acceleration. B) Speed. C) Force. D) Velocity. Show Answer Correct Answer: B) Speed. 55. The wheels and gears of a machine are greasedin order to decrease A) Output. B) Potential energy. C) Efficiency. D) Friction. Show Answer Correct Answer: D) Friction. 56. How does increasing the weight of an object affect friction? A) Depends on the surface. B) Decreases friction. C) No effect. D) Increases friction. Show Answer Correct Answer: D) Increases friction. 57. In a large commercial complex, there are four ways to reach the main road. One of the paths has loose soil, the second is laid with polished marble, the third is laid with bricks and the fourth has a gravel surface. It is raining heavily and Paheli wishes to reach the main road. The path on which she is least likely to slip is A) Bricks. B) Polished marble. C) Gravel. D) Loose soil. Show Answer Correct Answer: C) Gravel. 58. Rolling friction is greater than sliding friction. This is ..... A) True. B) Falls. C) All the above. D) None of the above. Show Answer Correct Answer: B) Falls. 59. The sole of the shoes and tyres of the treaded to reduce friction A) True. B) Falsetagst/F. C) All the above. D) None of the above. Show Answer Correct Answer: B) Falsetagst/F. 60. Which of the following is not a lubricant? A) Graphite. B) Water. C) Grease. D) Oil. Show Answer Correct Answer: B) Water. ← PreviousNext →Related QuizzesScience QuizzesClass 8 QuizzesClass 8 Science Chapter 12 Friction Quiz 1Class 8 Science Chapter 12 Friction Quiz 3 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books