Friction MCQs with Answers

Question-1. A boat or an aeroplane has a pointed or tapering front / head.Why?

1. For no reason
2. To increase the friction of fluid
3. To reduce the friction of fluid
4. To look good

Question-2. A matchstick struck on a matchbox catches fire easily because

1. None of the above
2. Friction may cause fire
3. Of chemical reaction
4. Force heated the match stick

Question-3. A Toy Car Released With The Same Initial Speed Will Travel Farthest On

1. Brick surface
2. Muddy
3. Polished marble surface
4. Cemented surface

Question-4. Ball-bearings are used to convert static friction into

1. none of these
2. drag
3. sliding friction
4. rolling friction

Question-5. Complete the sentence. Friction always

1. None of the options
2. Opposes the motion
3. Helps the motion
4. Helps the motion and opposes the motion

Question-6. Fluid are

1. None of the options
2. Gases and liquids both
3. Gases
4. Liquids

Question-7. 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.

1. Sliding, Static, Rolling
2. Rolling, Static, Sliding
3. Static, Rolling, Sliding
4. Rolling, sliding, static

Question-8. Friction is a

1. None of the options
2. Contact force
3. Non-contact force
4. Magnetic force

Question-9. Friction the rehuye motion between Io surfaces In contact.

1. none of these
2. favours
3. opposes
4. is

Question-10. It is difficult to walk on an oily floor because

1. Force of friction is very less
2. Floor gets spoiled
3. There is more resistance
4. Force of friction is high

Question-11. Lubricants

1. None of the options
2. Reduce friction
3. Increase friction
4. Increase friction and reduce friction

Question-12. Lubricants are substances which

1. Are used to put out a fire
2. Increase friction
3. Are used to light fire
4. Reduce friction

Question-13. Sliding friction is........................than / to rolling friction

1. None of the above
2. smaller
3. greater
4. equal

Question-14. Smooth surface has

1. all the above
2. less frictional force
3. more frictional force
4. sometimes less and sometimes more force

Question-15. Spring balance is a device used for measuring the…..................acting on an object.

1. None of the above
2. mass
3. pressure
4. force

Question-16. The frictional force exerted by fluids is also called

1. drown
2. drug
3. drag
4. drop

Question-17. The shape of the airplane is like a

1. All
2. Bird
3. Car
4. Dog

Question-18. The sole of the shoes becomes plain after wearing it for several months. The reason is

1. None of the above
2. Wearing out due to friction
3. Wearing out due to no friction
4. Sole is of bad quality

Question-19. Tyres are treaded to

1. increase weight of the tyre
2. look good
3. Increase friction
4. increase its longivity

Question-20. What kind of substances are known as lubricants

1. None of the options
2. Decrease friction
3. Increase friction
4. Increase or decrease friction

Question-21. Which of the following is characteristic of friction?

1. It can change the direction of motion
2. It is a non-contact force
3. It works on only resting body
4. It works opposite to direction of motion

Question-22. Which Of The Following Is Not An Advantage Of Fiction?

1. It enables vehicles to move on ground
2. It enables drawing to be made on paper
3. It enables fallen things to be picked up
4. It enables rubber pads to be rubbed off

Question-23. Which Of The Following Will Produce The Maximum Friction?

1. Rubbing of sand paper on sand paper
2. Rubbing of sand paper on glazed paper
3. Rubbing of sand paper on glass table top
4. Rubbing of sand paper on aluminium frame