Friction MCQs with Answers

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

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

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

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

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

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

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

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

Question-5. Complete the sentence. Friction always

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

Question-6. Fluid are

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

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

Question-8. Friction is a

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

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

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

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

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

Question-11. Lubricants

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

Question-12. Lubricants are substances which

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

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

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

Question-14. Smooth surface has

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

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

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

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

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

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

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

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

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

Question-19. Tyres are treaded to

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

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

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

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

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

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

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

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

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