Class 8 Science Chapter 12 MCQ (Multiple Choice Questions) of Friction updated for academic session 2022-2023 CBSE and state board students free to use. All the contents are prepared from latest NCERT Textbooks issued for session 2022-23. Every topic given in chapter 12 of class 8 science is covered in the format of MCQ quiz with suitable answers and explanation. Practice with these questions to score better in exams.

Class 8 Science Chapter 12 MCQ for 2022-2023

Class: 8Science
Chapter: 12Friction
Contents: MCQ Online Tests

MCQ Tests with Answers for Class 8 Science Chapter 12

Q1

A boy runs his toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be:

[A]. Wet marble floor, Dry marble floor, Newspaper, Towel
[B]. Newspaper, Towel, Dry marble floor, Wet marble floor
[C]. Towel, Newspaper, Dry marble floor, Wet marble floor
[D]. Wet marble floor, Dry marble floor, Towel, Newspaper
Q2

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.
Q3

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
Q4

A spring balance can be used to measure:

[A]. Mass of an object and force acting on an object
[B]. Force acting on an object and density of an object.
[C]. Force acting on an object and weight of an object
[D]. Weight of an object
Q5

If we apply oil on door hinges, the friction will:

[A]. [A] Increase
[B]. Decrease
[C]. Disappear Altogether
[D]. Will remain unchanged
Q6

The friction between two surfaces does not depend on one of the following. This one is:

[A]. Amount of surface area of the two objects which is in contact with each other
[B]. Weight of the object which tends to move on the surface of other object
[C]. Degree of smoothness of surfaces of two objects in contact with each other
[D]. Degree of roughness of surfaces of two objects in contact with each other
Q7

Which of the following statements is incorrect?

[A]. Friction acts on a ball rolling along the ground.
[B]. Friction acts on a boat moving on water
[C]. Friction acts on a bicycle moving on a smooth road.
[D]. Friction does not act on a ball moving through air.
Q8

A boy rolls a rubber ball on a wooden surface. The ball travels a short distance before coming to rest. To make the same, ball travel longer distance before coming to rest, he may:

[A]. Spread a carpet on the wooden surface.
[B]. Cover the ball with a piece of cloth.
[C]. Sprinkle talcum powder on the wooden surface.
[D]. Sprinkle sand on the wooden surface.
Q9

Which of the following statements is or are incorrect?

[A]. Static friction is greater than rolling friction
[B]. Sliding friction is less than rolling friction
[C]. Rolling friction is less than static friction
[D]. Static friction is greater than sliding friction
Q10

If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should be most likely be:

[A]. 25 N
[B]. 20 N
[C]. 5 N
[D]. 50 N
Q11

Priya is writing some statements, choose the correct statement and help her:

[A]. Higher speed of an object moving through a fluid, greater will be the frictional force. Acting on it.
[B]. Larger the size of an object moving through a fluid, greater will be the frictional force acting on it.
[C]. Higher the viscosity or thickness of fluid, greater will be the frictional force or drag acting on an object moving through it.
[D]. All the above.
Q12

If the static friction between two surfaces P and Q is measured to be 50 N, then the sliding friction between these two surfaces is most likely to be:

[A]. 75N
[B]. 45N
[C]. 55N
[D]. 65N
Q13

Consider the following statements and choose the correct one:

[A]. Friction can be reduced by making the surfaces smooth by polishing.
[B]. Friction can be reduced by applying lubricants to the rubbing surfaces
[C]. Friction can be reduced by using wheel to move objects
[D]. All the above.
Q14

Four similar cars having exactly the same mass and running at the same speed on the same road when brakes are applied at the same time. The cars come to a stop after covering a distance of 5 m, 5.5 m, 4.8 m, and 5.2 m respectively. The friction between the brake pads and disc will be the maximum in car which travels the distance of:

[A]. 5 m
[B]. 5.5 m
[C]. 4.8 m
[D]. 5.2 m
Q15

Read the following sentences carefully, and choose the incorrect one:

[A]. Grooves are made in the soles of shoes to increase friction and prevent slipping.
[B]. Spikes are provided in the shoes of player and athletes to increase friction and prevent slipping.
[C]. Machines belts are made of special materials to increase friction and drive machines wheels properly.
[D]. None of the above.
Q16

A book is lying on the horizontal table top. If we till the table, then the book starts sliding down slowly. This happens because:

[A]. Sliding friction is greater than static friction
[B]. Sliding friction is less than force of gravity
[C]. Static friction is greater than sliding friction
[D]. Force of gravity is less than sliding friction
Q17

In a science quiz competition, Payel is asked a question where she had to choose the statement which was/were incorrect?

[A]. The brakes of a car and bicycle work by friction.
[B]. The friction between brake pad and rim prevents the wheel from moving ahead.
[C]. If there were no friction, then once a vehicle started moving it would never stop.
[D]. None of the above
Q18

A body shape which offers very little resistance to the flow of air (or water) around it is called:

[A]. Trimlined shape
[B]. Steamlined shape
[C]. Streaklined shape
[D]. Streamlined shape
Q19

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. Nails and screws are also held in wood by friction.
[B]. Friction enables knot to be tied in strings or ropes etc.
[C]. Friction enables a person to climb a tree or pole.
[D]. Friction does not help a ladder to be leaned against the wall.
Q20

Which of the following does not have a streamlined shape?

[A]. Aeroplane
[B]. Boat
[C]. Bird
[D]. Bus
Q21

Which of the statements is or are correct about “Friction”?

[A]. Friction force can only slow things down
[B]. Friction is force that only occurs when an object moves.
[C]. Friction is force that only occurs on rough surfaces.
[D]. Friction is force that only occurs between solids
Q22

Bikash is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. The pencil cell travels the least distance on the towel.
[B]. The pencil cell travels a larger distance on the wet marble floor.
[C]. The pencil cell travels less distance on the newspaper sheet then the dry marble floor.
[D]. All the above.
Q23

Consider the following statements and choose the correct one:

[A]. The fluid friction can be reduced or minimized by giving special shape called “streamlined shape”.
[B]. An aeroplane has a streamlined shape to reduces air friction that it encounters when flying at high speed through the sky.
[C]. The rockets are also built with streamlined shapes so that they encounter the minimum air resistance or drag due to air.
[D]. All the above.
Q24

Final examination in the last year, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

[A]. When the oil is poured the marble floor, it decreases the irregularities.
[B]. When an object is pulled by a spring it decreases the friction.
[C]. Wrapping of polythene sheet makes the surface of bricks smooth due to which the friction with floor decreases
[D]. Wrapping of jute clothes make the surface of brick more-rough due to which the friction with floor decreases.
Q25

Ball bearing is a device which usually converts:

[A]. Rolling friction into sliding friction
[B]. Static friction into sliding friction
[C]. Sliding friction into rolling friction
[D]. Rolling friction into static friction

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According to CBSE latest pattern of question papers, in every subject MCQ with four options will be asked. These MCQ help to revise the chapter as well as provide a perfect way for quick revision.