NCERT Solutions for Class 8 Science Chapter 12: Class 8 Science chapter 12 is Friction. Chapter 7 is a fairly important chapter for the students of Class 8. The subject-matter experts at Embibe have prepared the NCERT solutions for chapter 12, in order to help students solve the concepts at their convenience and score maximum marks. These solutions will help students understand how to write comprehensive answers covering all the key information effectively.

The Class 8 Science chapter 12 deals with force of friction, forces affecting friction, increasing and reducing friction, wheels reduce friction, fluid friction, etc. Embibe provides a set of 600+ practice questions for all the sub-topics present in chapter 12. Students are advised to practice all the in-text questions delivered by Embibe to perform well in the exams. Keep reading to find NCERT solutions for Class 8 Science chapter 12.

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NCERT Solutions for Class 8 Science Chapter 12: Important Topics

The concepts taught in Friction are interesting and fun to learn and understand. Students must solve all different types of question to develop in-depth understanding of the chapter. The more questions a /she student solves, more quickly will he/she be able to answer any type of question in the final exam. Students must practice the questions frequently to be able to answer the questions in the final exam.

Embibe offers answer for each question of Class 8 Science chapter 12 based on the latest syllabus. Students can practice all the questions for free to score good marks in the exams. Along with free NCERT solutions, Embibe also offers NCERT 3D Videos, NCERT Exemplars, Embibe Explainers, etc., for free. Below-mentioned is the list of topics present in Class 8 Science chapter 12.

Section Name	Topic Name
12	Friction
12.1	Force of Friction
12.2	Factors affecting Friction
12.3	Friction: A Necessary Evil
12.4	Increasing and Reducing Friction
12.5	Wheels Reduce Friction
12.6	Fluid Friction

NCERT Solutions Class 8 Science Chapter 12

We have provided some important points to remember for NCERT Class 8 Science chapter 12 as mentioned below:

1. Force of Friction:

(i) Friction: The opposing force acting when two surfaces in contact slide or tend to slide relative to one another.

(ii) Friction always acts in the direction opposite to the direction of the relative motion of contact surfaces.

2. Friction: A Necessary Evil:

(i) Friction brings about wear and tear and increases energy consumption in operating machines.

3. Increasing and Decreasing Friction:

(i) Ball-bearing: A device used for reducing rolling friction, by making an axle to move over metal balls placed around it radially.

(ii) Lubricant: A material which, when applied between two surfaces in contact, reduces the friction.

(iii) Friction can be reduced by

(a) using lubricants

(b) using soap solutions

(c) using fine powders

(d) polishing surfaces

(e) streamlining

(f) converting sliding friction into rolling friction.

4. Factors Affecting Friction:

(i) Friction is caused due to interlocking of irregularities of two surfaces in contact with each other.

(ii) Irregularities: Uneven projections on the surfaces of a body.

(iii) Limiting friction: The maximum force of static friction acting, when the surface of one body is about to slide over the surface of another body.

(iv) Rolling friction: Friction experienced by a body when made to move over roller/wheels.

(v) Static friction: The force of friction acting between the contact surfaces, when one tries to move with respect to other.

NCERT Solutions for Class 8 Science: All Chapters

Students can download the NCERT Solutions for Class 8 Science from the following:

• 1st Chapter – Crop Production and Management
• 2nd Chapter – Microorganisms: Friend and Foe
• 3rd Chapter – Synthetic Fibres and Plastics
• 4th Chapter – Materials: Metals and Non-Metals
• 5th Chapter – Coal and Petroleum
• 6th Chapter – Combustion and Flame
• 7th Chapter – Conservation of Plants and Animals
• 8th Chapter – Cell – Structure and Functions
• 9th Chapter – Reproduction in Animals
• 10th Chapter – Reaching the Age of Adolescence
• 11th Chapter – Force and Pressure
• 12th Chapter – Friction
• 13th Chapter – Sound
• 14th Chapter – Chemical Effects of Electric Current
• 15th Chapter – Some Natural Phenomena
• 16th Chapter – Light
• 17th Chapter – Stars and the Solar System
• 18th Chapter – Pollution of Air and Water

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