Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play:

Force of friction acts in solids, liquids and gases and opposes the motion with respect to each other.

To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?

Stone will be more suitable because it will exert greater reaction and hence greater friction force which sharpen the blade of a knife easily by rubbing.

A big wooden box is being pushed on the ground from east to west direction. The force of friction due to ground will act on this box towards:

As we know that friction force acts in an opposite direction to the direction in which an object moves. If a big wooden box is being pushed on the ground from east to west direction. The force of friction due to ground will act on “east direction”.

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

The friction will decrease because oil acts as a lubricant which reduce friction.

Which of the following is not an advantage of fiction?

There are many advantages and disadvantages of friction force. Here, all are the advantages mentioned in all options, except one i.e., option [C]. Friction enables rubber pads to be rubbed off, the tyres of vehicles wear out gradually, soles of our shoes tear out, brake pads of vehicles rubbed off also.

In a large commercial complex, there are four ways to reach the main road. One of the path has loose soil, the second is laid with polished marble, the third is laid with bricks and the fourth has gravel surface. It is raining heavily and Paheli wishes to reach the main road. The path on which she is least likely to slip is:

She should use gravel surface path because only in this path. She will have sufficient friction force to walk easily.

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

Here, all the statements are correct. Hence, your answer will be option [D].

Which of the following will produce the maximum friction?

The friction between two surfaces depends on two factors first is, the nature of the two surfaces or smoothness or roughness of the two surfaces and second is, the force with which two surfaces are pressed together or weight. As the roughness of the surface increases, the friction increases. Here, glazed paper, glass table top and aluminium frame produces less friction than “sand paper”. Hence, your answer will be option [D].

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

Here, all the statements are correct. Hence, your answer will be option [D].

The weight of an object can be measured by a:

The spring balance is a device which is used for measuring force acting on an object. The spring balance contain a coiled spring which gets stretched when a force is applied to its free end or hook end. When the spring balance is held vertically, it is said to measure the weight of an object hung from its hook, because weight of an object is also a force. Therefore, a spring balance is a device, used to measure force acting on an object and weight of an object.

Which of the following statement is or are correct?

Here, all the statements are correct. Hence, your answer will be option [D].

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

Here, all the statements are correct. Hence, your answer will be option [D].

Consider the following statements and choose the incorrect one:

Here, all the statements are correct. Hence, your answer will be option [D].

Which of the following should be used to reduce friction on a carrom board?

Using a dry lubricant or talcum powder to reduce the friction on carom board.

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

Remember, friction enables a ladder to be leaned against the wall and not slip down to the floor. The irregularities capture the both ends of ladders.

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

Friction is force that only occurs when an object moves. The force of friction acts in the direction opposite to the direction of motion of an object.

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

Here, all the statements are correct. Hence, your answer will be option [D].

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?

Wrapping of jute clothes make the surface of brick more-rough due to which the friction with floor increases.

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

Here, all the statements are correct. Hence, your answer will be option [D].

Class 8 Science Chapter 12 MCQ

Class 8 Science Chapter 12 MCQ (Multiple Choice Questions) of Friction updated for academic session 2021-2022 CBSE and state board students free to use. All the contents are prepared from latest NCERT Textbooks issued for session 2021-22.

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 2021-2022

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

MCQ Tests with Answers for Class 8 Science Chapter 12

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

View Answer

Four children were asked to arrange forces due to rolling, static and sliding friction in a decreasing order. The correct arrangement is:

[A]. Rolling, Static, Sliding

[B]. Rolling, Sliding, Static

[C]. Static, Sliding, Rolling

[D]. Sliding, Static, Rolling

View Answer

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

View Answer

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.

View Answer

Which of the following statement is or are incorrect?

[A]. Friction can never be entirely eliminated.

[B]. Dolphins are streamlined body by nature to reduce friction with water.

[C]. The use of ball bearing makes the wheel roll smoothly over the axle.

[D]. None of the above.

View Answer

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

View Answer

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

View Answer

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

View Answer

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

[A]. We are able to fix nails in a wall due to friction.

[B]. Friction enables the belts to drive machine in factories

[C]. Friction helps in the construction of buildings.

[D]. All the above.

View Answer

Q10

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.

View Answer

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Why MCQs are important?

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.

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Class 8 Science Chapter 12 MCQ

Class 8 Science Chapter 12 MCQ for 2021-2022

MCQ Tests with Answers for Class 8 Science Chapter 12

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:

Four children were asked to arrange forces due to rolling, static and sliding friction in a decreasing order. The correct arrangement is:

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

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:

Which of the following statement is or are incorrect?

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

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

Consider the following statements and choose the correct one:

Why MCQs are important?

High School

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Class 8 Science Chapter 12 MCQ

Class 8 Science Chapter 12 MCQ for 2021-2022

MCQ Tests with Answers for Class 8 Science Chapter 12

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:

Four children were asked to arrange forces due to rolling, static and sliding friction in a decreasing order. The correct arrangement is:

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

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:

Which of the following statement is or are incorrect?

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

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

Consider the following statements and choose the correct one:

Why MCQs are important?

NCERT Solutions

High School

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