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After reading this chapter, students will get to know about what is friction, the forces of friction, factors affecting friction, increasing and reducing friction, types of friction, what are the causes of friction, and why friction is necessary.
- Friction Class 8 Science Ncert Textbook Questions
- Friction Class 8 Science Ncert Intext Activities Solved
- Ncert Solutions For Class 8 Science Chapter 12 – 1 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 12 – 2 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 12 – 3 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 12 – 5 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 12 Mcqs
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Question 1. Fill in the blanks. (a) Friction opposes the ______ between the surfaces in contact with each other. (b) Friction depends on the ______ of surfaces. (c) Friction produces ______ (d) The sprinkling of powder on the carrom board _______ friction. (e) Sliding friction is _______ than the static friction. Solution: (a) relative motion (b) s...
Activity 1 (NCERT Textbook, Page 146) Gently push a book on a table [Fig. 12.2(a)]. You observe that it stops after moving for some distance. Repeat this activity pushing the book from the opposite direction [Fig. 12.2 (b)]. Does the book stop this time, too? Can you think of an explanation? Can we say that a force must be acting on the book opposi...
Question 1. Define friction. Answer: Friction is the force which resists the motion of a body, while moving on a surface. Question 2. What is meant by sliding friction ? Answer: When one surface is sliding over the other, sliding friction comes into play. Question 3. When does static friction come into play ? Answer: Static friction comes into play...
Question 1. When your writing desk is tilted a little, a book kept on it starts sliding down. Mention the direction of the frictional force acting on it. Answer: The frictional force acts in the upward direction. Question 2. You spill a bucket of soapy water on a marble floor accidently. Would it make easier or more difficult for you to walk on the...
Question 1. Give examples to show that friction is both a friend and a foe. [NCERT] Answer: 1. Friction is a friend in the following ways — it helps us to walk, to write on the blackboard and to apply the brakes of a car. 2. Friction is a foe in the following ways — it causes wear and tear of machinery and shoes, it produces heat in the machinery. ...
Question 1. Fill in the blanks : [NCERT] 1. Friction opposes the ………….. between the surfaces in contact with each other. 2. Friction depends on the ………….. of surfaces. 3. Friction produces ………….. 4. Sprinkling of powder on the carom board ……….. friction. 5. Sliding friction is than the static friction. Answer: 1. Relative motion 2. Nature 3. Heat ...
Question 1. Suppose your writing desk is tilted a little. A book kept on it, starts sliding down. The figure, showing the correct direction of frictional-force acting on it, is Answer: (d) Question 2. Friction, that exists between two surfaces in contact, when there is no relative motion between them, is called (a) sliding friction (b) static frict...
Learn about the concepts and examples of friction, a force that opposes relative motion between surfaces. Find out how to increase or reduce friction, and how it affects our daily life.
The force of friction always opposes the applied force. In the above activity, the force of friction acts between the surface of the book and the surface of the table. Is the friction the same for all the surfaces? Does it depend on the smoothness of the surfaces? Let us find out. 12.2 Factors affecting Friction. Activity 12.2.
- Figure 1 Force of Friction. Factors that can affect Friction.
- Figure 2 Contact between two surfaces. The irregularities of a surface: If we move an object with has an irregular or rough surface on another surface which is also irregular, the force of Friction will be high in this case and the movement of the object would be restricted.
- Figure 3 Factors Affecting Friction. Types of Friction. Static Friction: The Frictional force that comes into play until an object starts moving is called static Friction.
- Figure 4 Types of Friction. Rolling Friction < Sliding Friction < Static Friction. Advantages of Frictional Force. Frictional force is necessary for various purposes in our daily lives such as
Jan 24, 2024 · CBSE Class 8 Science Notes Chapter 12 Friction. Friction opposes the relative motion between two surfaces in contact. It acts on both the surfaces. Factors Affecting Friction. Friction depends on the nature of surfaces in contact. For a given pair of surfaces, friction depends upon the state of smoothness or roughness of those surfaces.
5 days ago · Download Friction CBSE Class 8 Science Chapter 12 notes PDF for free. Secure good marks by referring NCERT Class 8 Friction revision notes prepared by Vedantu experts.
5 days ago · Class 8 Science Chapter 9 discusses the different types of friction, including static, sliding, and rolling friction, and explores the conditions under which each type occurs. Detailed explanations are provided on the methods of increasing and reducing friction, highlighting the practical uses and challenges associated with these adjustments in ...
