This quiz works best with JavaScript enabled. Home > Class 8 > Class 8 Science Chapter 12 Friction ā Quiz 4 š Homepage š Download PDF Books š Premium PDF Books Class 8 Science Chapter 12 Friction Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When there is friction, the energy of an object's motion is converted into ..... energy A) Heat. B) Kinetic. C) Stronger. D) Friction. Show Answer Correct Answer: A) Heat. 2. 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. 3. 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. 4. 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. 5. 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. 6. How can friction be reduced? A) Make surfaces rougher. B) Increase force applied to objects in contact. C) Add a lubricant. D) Increase the weight of each object. Show Answer Correct Answer: C) Add a lubricant. 7. A type of friction that occurs when air pushes against a moving object causing it to decelerate. A) Surface Area. B) AIR RESISTANCE. C) VELOCITY. D) GRAVITY. Show Answer Correct Answer: B) AIR RESISTANCE. 8. 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. 9. In which type of friction "the static friction is equal to applied force" ? A) Rolling friction. B) Sliding friction. C) Static friction. D) Fluid friction. Show Answer Correct Answer: C) Static friction. 10. 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. 11. 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. 12. 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. 13. Which of the following surface will have least friction? A) Glass. B) Paper. C) Cardboard. D) Wood. Show Answer Correct Answer: A) Glass. 14. 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. 15. 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. 16. Which is a/ are streamlined object? A) Aeroplane. B) Boat. C) Ship. D) All the above. Show Answer Correct Answer: D) All the above. 17. Which of the following materials is likely to have least friction A) Wood. B) Cardboard. C) Glass. D) Paper. Show Answer Correct Answer: C) Glass. 18. Which of the following is a method to increase friction? A) Using a lubricant. B) Increasing surface roughness. C) Reducing weight. D) Using smooth surfaces. Show Answer Correct Answer: B) Increasing surface roughness. 19. 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. 20. What is the unit called that measures force? A) Weight. B) Meter. C) Newton. D) Kilogram. Show Answer Correct Answer: C) Newton. 21. 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. 22. When limiting friction is greater than force applied A) The body doesn't move. B) The body moves slightly. C) Force applied becomes 0. D) Net force becomes limiting friction + force applied. Show Answer Correct Answer: A) The body doesn't move. 23. Tyres are treaded to A) Decrease friction. B) Increase friction. C) Both a & b. D) None. Show Answer Correct Answer: B) Increase friction. 24. 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). 25. 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. ā PreviousNext āRelated QuizzesClass 8 Science Chapter 12 Friction Quiz 1Class 8 Science Chapter 12 Friction Quiz 2Class 8 Science Chapter 12 Friction Quiz 3Class 8 Science Chapter 12 Friction Quiz 5Class 8 Science Chapter 12 Friction Quiz 6Class 8 Science Chapter 12 Friction Quiz 7Class 8 Science Chapter 12 Friction Quiz 8Class 8 Civics Chapter 1 The Indian Constitution QuizClass 8 Civics Chapter 10 Law And Social Justice QuizClass 8 Civics Chapter 2 Understanding Secularism QuizClass 8 Civics Chapter 3 Why Do We Need A Parliament QuizClass 8 Civics Chapter 4 Understanding Laws QuizClass 8 Civics Chapter 5 The Judiciary QuizClass 8 Civics Chapter 6 Understanding Our Criminal Justice System QuizClass 8 Civics Chapter 7 Understanding Marginalisation QuizClass 8 Civics Chapter 8 Confronting Marginalisation QuizClass 8 Civics Chapter 9 Public Facilities QuizClass 8 English Chapter 1 The Best Christmas Present In 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