Friction MCQs with answers

Dear candidates you will find MCQ questions of 8th Class - Science | Chapter: Friction here. Learn these questions and prepare yourself for coming examinations. You can check the right answer of any question by clicking the option or by clicking view answer button.
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Q. Friction due to fluids is called
  • (A) force
  • (B) pressure
  • (C) friction
  • (D) drag
πŸ’¬ Discuss
βœ… Correct Answer: (D) drag
Q. In which of the following friction is troublesome
  • (A) sharpening a knife by rubbing it against a stone
  • (B) applying the brekes to stop a cycle.
  • (C) walking on a wet road
  • (D) rubbing the matchstick with the side of matchbox before burning it
πŸ’¬ Discuss
βœ… Correct Answer: (C) walking on a wet road
Q. Friction is
  • (A) foe
  • (B) friend
  • (C) both (a) and (b)
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (C) both (a) and (b)
Q. Gymnasts apply some coarse substance on their hands to:
  • (A) increase friction for better grip
  • (B) decrease friction
  • (C) play fast
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) increase friction for better grip
Q. The shape of an aeroplane is like a
  • (A) dog
  • (B) bird
  • (C) car
  • (D) all of these
πŸ’¬ Discuss
βœ… Correct Answer: (B) bird
Q. Which of the following is true
  • (A) We write on a paper with pen due to friction
  • (B) A nail is fixed in the wall due to friction
  • (C) Soles of shoes wear out due of friction
  • (D) All of these
πŸ’¬ Discuss
βœ… Correct Answer: (D) All of these
Q. To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
  • (A) Stone
  • (B) Plastic block
  • (C) Wooden block
  • (D) Glass block
πŸ’¬ Discuss
βœ… Correct Answer: (A) Stone
Q. If we apply the force along the right, the friction acts along the
  • (A) right direction
  • (B) left direction
  • (C) can’t say
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (B) left direction
Q. 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 the objects are solid.
  • (B) only if one of the two objects is liquid.
  • (C) only if one of the two objects is gaseous.
  • (D) irrespective of whether the objects are solid, liquid or gaseous.
πŸ’¬ Discuss
βœ… Correct Answer: (D) irrespective of whether the objects are solid, liquid or gaseous.
Q. The two common forces that are acting everywhere around us are:
  • (A) gravity and friction
  • (B) gravity and magnetic force
  • (C) electrostatic force and gravity
  • (D) friction and magnetic force
πŸ’¬ Discuss
βœ… Correct Answer: (A) gravity and friction
Q. Static friction is less than
  • (A) sliding friction
  • (B) rolling friction
  • (C) both (a) and (b)
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (D) none of these
Q. The easiest way to move a heavy wooden crate is to
  • (A) place it on a trolley
  • (B) tie a rope one end and pull
  • (C) push it
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) place it on a trolley
Q. Friction can be reduced by using
  • (A) oil
  • (B) grease
  • (C) powder
  • (D) all of these
πŸ’¬ Discuss
βœ… Correct Answer: (D) all of these
Q. Talcum powder should not be spilled on the floor of room because
  • (A) it will stain the floor
  • (B) it may cause us to slip and fall
  • (C) it is messy
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (B) it may cause us to slip and fall
Q. Friction always
  • (A) opposes the motion
  • (B) helps the motion
  • (C) both (a) and (b)
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) opposes the motion
Q. Which of the following is true about friction
  • (A) Friction can only slow things down
  • (B) Friction is a force that only occurs when an object moves
  • (C) Friction is a force that only occurs on rough surfaces
  • (D) Friction is a force that occurs only between solids
πŸ’¬ Discuss
βœ… Correct Answer: (B) Friction is a force that only occurs when an object moves
Q. Which of the following produces least friction?
  • (A) Sliding friction
  • (B) Rolling friction
  • (C) Composite friction
  • (D) Static friction
πŸ’¬ Discuss
βœ… Correct Answer: (B) Rolling friction
Q. A matchstick catches fire when struck against the side of the matchbox because:
  • (A) of the chemicals
  • (B) of friction
  • (C) friction produces a spark and the
  • (D) none of these chemicals catches fire
πŸ’¬ Discuss
βœ… Correct Answer: (C) friction produces a spark and the
Q. Friction is a
  • (A) non-contact force
  • (B) contact force
  • (C) magnetic force
  • (D) electrostatic force
πŸ’¬ Discuss
βœ… Correct Answer: (B) contact force
Q. The hinges of creaking doors are oiled to
  • (A) keep them clean
  • (B) open and close them easily
  • (C) reduce noise and wears and tear
  • (D) none of these
πŸ’¬ Discuss
βœ… Correct Answer: (C) reduce noise and wears and tear

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