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# NCERT Solutions for Class 8 Science Chapter 11- Force and Pressure

NCERT Solutions for Class 8 Science Chapter 11 – Force and Pressure is prepared to help you score better in CBSE exams. This chapter is an essential area of physics, and the topics covered in this chapter include definition and cause of force, the ability of a force to change direction and shape of objects, contact and non-contact forces, types of forces, and pressure exerted by substances and atmosphere.

NCERT Solutions for the Chapter – ‘Force and Pressure’ contains answers to all the questions asked in this chapter in detail. This exercise-wise help you to develop an in-depth understanding of all topics of Force and Pressure. Chapter 11  help to lay down the right conceptual foundation for higher-level classes.

Our premium quality CBSE NCERT Solutions follow a conceptual flow that makes learning more effective. You will find them extremely handy during exam time and are best for effective revision sessions. These solutions have been answered in a manner to help you become thorough with all essential concepts, clear your doubts and excel in CBSE exams.

## NCERT Class 8 Science Chapter 11 – Force and Pressure: Important Topic

NCERT Solutions for Class 8 Science Chapter 11-Force and pressure introduces you to the term force through its application by describing day to day activities.

• Force – A Push or a Pull

This part of the chapter describes that most of the actions done in daily life can be named as a pull or a push. It also tells you how moving an object needs pushing or pulling. A physical push or a pull on an object is called a force.

• Forces are due to an Interaction

Using different examples of daily life, this part of the 11th chapter given in CBSE NCERT Class 8 Science Book will tell you that a force arises due to the interaction between two objects.

• Exploring Forces

This part tells you some more exciting concepts about force. When forces are applied on an object in the same direction, they become added forces, and if applied in opposite directions on an object, the net force acting on it is the difference between the two forces. It teaches us that the difference in magnitude of forces expresses its strength.

• Force has the ability to change the State of Motion

This portion of the chapter establishes that force exerted on an object could alter its speed. In case the force applied on the object is in the same direction of its motion, the speed of the object increases. If the force is applied in the opposite direction, then speed decreases. Force can change the speed and direction of an object. Hence, it can change the state of the motion of any object.

• Force can Change the Shape of an Object

This part of the NCERT CBSE Class 8 Science Chapter 11 tells you that when forces act on an object may cause a change in its shape.

• Contact Forces

This part of the chapter emphasizes the fact that it is indispensable to have contact between two objects to exert force. It elaborates about contact forces and the various types. Some of them have been covered below.

1. Muscular Force – We apply force in most of our daily chores, and the force resulting due to the action of muscles (humans and animals) is known as the muscular force. This is a type of contact force because it can be applied when the body is in contact with the object.
2. FrictionClass 8 Science Force and Pressure also tell you about the force responsible for changing the state of motion of objects is the force of friction. Friction is a contact force acting on every moving object where its direction is always opposite to the direction of motion.
• Non-Contact Forces

Forces acting on objects that are not in contact with each other are known as non-contact forces. It also covers different types of non-contact forces, such as the following.

1. Magnetic Force – Magnets exert non-contact force on other magnets and iron.
2. Electrostatic Force – The force exerted on a charged or uncharged body by another charged body is known as electrostatic force. This is also a non-contact force.
3. Gravitational Force – The force of gravity offered by the earth is attractive and acts on all objects. This is termed as gravitational force
• Pressure

This part of CBSE NCERT Class 8 Science Chapter 11 tells you that the area on which the force is applied makes the tasks successful and smooth. The force acting per unit area of a surface is called pressure.

• Pressure Exerted by Liquids and Gases

This portion of the NCERT CBSE Class 8 Science Chapter 11 teaches you that liquids and gases exert pressure on the walls of their containers.

• Atmospheric Pressure

The envelope of air around us is known as the atmosphere, and the pressure exerted by this air is known as atmospheric pressure.

## NCERT Class 8 Science Chapter 11 – Force and Pressure: Exercise Discussion

NCERT Solutions for Class 8 Science Chapter 11 – Force and Pressure give step by step solutions of all the 10 questions given in the chapter. The concepts of NCERT Class 8 Science Chapter 11 are essential in understanding and describing the day to day activities.

The contents and components of the questions given in this chapter of CBSE NCERT Class 8 Science Book are as follows-

• Question no. 1, 3, and 5 ask you to analyze the given situations to divide in push or pull activities for exerting force.
• Question no. 2 and 6 ask you to mention and analyze situations where force can change shape. Chapter 11 helps you to solve these questions accurately.
• Question no. 4 of CBSE NCERT Class 8 Science Chapter 11 is based on the types and examples of forces encountered in daily lives. It uses your analytical skills.
• Question no. 7 tests your knowledge about electrostatic force and how it can be generated.
• Question no. 8 covers the topic ability of the force to change the state of motion of an object. The Chapter – Force and Pressure explain all concepts in an easy to understand way.
• Question no. 9 uses your application skills with respect to the topic gravitational pull and frictional force of atmosphere. NCERT Solutions for Chapter 11 – Force and Pressure provide you with the best solutions.
• Question no. 10 uses your cover of the concept of equality of atmospheric pressure everywhere.

NCERT Solutions for Class 8 Science Chapter 11 – Force and Pressure gives you the solutions of the above questions in a stepwise manner with utmost clarity.

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