NCERT Solutions For Class 8 Science Chapter 8 Force and Pressure

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure

Edited By Vishal kumar | Updated on Apr 21, 2025 11:25 AM IST

We come across many situations in daily life when the concepts of force and pressure are applicable. Consider opening a door, for instance, where you must push or pull it to move. Applying force, a fundamental concept in understanding how objects move or remain still, is what this simple motion implies.

This Story also Contains

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure
NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure: Solved Exercise Questions
Class 8 Force and Pressure Questions and Answers: Key Formulas and Concepts
Force And Pressure Class 8 NCERT Science Topics
NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure- Points to remember:
NCERT Chapter-Wise Solutions For Class 8th Science

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure

In the NCERT solutions of Class 8 Science Chapter 8, named Force and Pressure, you will learn more about these important concepts. This chapter discusses the various forms of forces and how pressure affects objects.Going through the Class 8 Science solutions will not only help you understand these concepts, but will also increase your chances of succeeding in the exams.

This chapter has now been renumbered as Chapter 8 in the revised CBSE syllabush for the 2025-26 academic year, and continues to be a vital topic for students to master in order to perform well in their studies.

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure

The chapter focuses on key topics such as the force, pressure, with several questions and answers designed to reinforce these concepts. These solutions are particularly beneficial for self-study, helping students to grasp important ideas and perform well in exams.

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure: Solved Exercise Questions

Q1. Give two examples each of situations in which you push or pull to change the state of motion of objects.

Answer:

Two examples of the situation in which the state of motion of an object is changed through a push are as follows:

(a) A table whose position in a room has to be changed is moved by pushing it.

(b) In a match of cricket, the batsman hits the ball by pushing it with a bat.

Two examples of the situation in which the state of motion of an object is changed through a pull are as follows:

(a) In a game of tug of war, both teams try to bring the rope towards their side by pulling it.

(b) A train moves when the engine pulls the rest of the bogies.

Q2. Give two examples of situations in which applied force causes a change in the shape of an object.

Answer:

Two examples of situations in which applied force causes a change in the shape of an object are as follows:

(a) The shape of a rubber band changes (it stretches) once it is pulled from both ends.

(b) The shape of dough is changed before making it into a roti.

Q3. Fill in the blanks in the following statements.

(a) To draw water from a well we have to __________ at the rope.
(b) A charged body __________ an uncharged body towards it.
(c) To move a loaded trolley we have to __________ it.
(d) The north pole of a magnet __________the north pole of another magnet.

Answer:

(a) To draw water from a well we have to pull at the rope.
(b) A charged body attracts an uncharged body towards it.
(c) To move a loaded trolley we have to either pull or push it.
(d) The north pole of a magnet repels the north pole of another magnet.

Q4. An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms.

muscular, contact, non-contact, gravity, friction, shape, attraction

(a) To stretch the bow, the archer applies a force that causes a change in its __________.
(b) The force applied by the archer to stretch the bow is an example of __________ force.
(c) The type of force responsible for a change in the state of motion of the arrow is an example of a __________ force.
(d) While the arrow moves towards its target, the forces acting on it are due to __________ and that due to __________ of air.

Answer:

a) To stretch the bow, the archer applies a force that causes a change in its shape .
(b) The force applied by the archer to stretch the bow is an example of muscular force.
(c) The type of force responsible for a change in the state of motion of the arrow is an example of a contact force.
(d) While the arrow moves towards its target, the forces acting on it are due to gravity and that due to the friction of air.

Q5. In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.

(a) Squeezing a piece of lemon between the fingers to extract its juice.

Answer:

The fingers exert muscular force on the lemon . As an effect of this force, the lemon gets squeezed .

Q5. In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.

(b) Taking out paste from a toothpaste tube.

Answer:

We use our fingers to apply muscular force on the toothpaste tube . This applied muscular force changes the shape of the tube causing the toothpaste to come out of it.

Q5. In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.

Answer:

The load pulls the spring . As an effect of this pull, the spring stretches .

Q5. In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case.

(d) An athlete making a high jump to clear the bar at a certain height.

Answer:

The athlete pushes the ground using muscular force. This causes the athlete to rise in the air.

Q6. A blacksmith hammers a hot piece of iron while making a tool. How does the force due to hammering affect the piece of iron?

Answer:

While hammering a hot piece the blacksmith applies force on it using the hammer thus causing a change in the shape of the piece of iron. For example, the blacksmith can make a cylindrical block of iron to rectangular block by heating it and hammering.

Q7. An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. What force might be responsible for the attraction between the balloon and the wall?

Answer:

On rubbing the balloon against a piece of synthetic cloth the balloon gains charge . The wall is uncharged and is attracted by the charged balloon since a charged body attracts an uncharged body . The electrostatic force is responsible for the attraction between the balloon and the wall.

Q8. Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.

Answer:

The forces acting on the bucket are muscular force applied by our hand and gravitational force. The forces acting do not bring a change in the state of the motion as the forces are equal in magnitude and act in the opposite direction.

Q9. A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.

Answer:

Two forces acting on the rocket are the gravitational force and friction of the air in the atmosphere. The gravitational force pulls the rocket towards the earth and the friction force also opposes the motion of the rocket.

Q10. When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to

(a) the pressure of water.
(b) the gravity of the earth.
(c) the shape of a rubber bulb.
(d) atmospheric pressure.

Answer:

The rise of water in the dropper is due to atmospheric pressure. The atmospheric pressure is more than the pressure inside the dropper thus pushing the water inside it.

Careers360 experts created clear and easy-to-follow solutions for Class 8 Science Chapter 8, which are available in PDF format for simple access. The solutions comprise ten questions, with a mix of simple question-and-answer and fill-in-the-blank varieties. These materials are meant to help students prepare for exams by ensuring that they completely understand the concepts presented in the chapter. Furthermore, practicing the force and pressure questions helps students identify their own strengths and limitations, allowing them to focus on areas for growth and improve their overall performance.

Class 8 Force and Pressure Questions and Answers: Key Formulas and Concepts

Force:

A force is any interaction that, when unopposed, will change the motion of an object. It can cause an object to move, stop, or change direction. Common examples include pushing a box or pulling a cart.
F=m×a

Where: F is the force applied, m is the mass of the object and a is the acceleration of the object
Force is a vector quantity, meaning it has both magnitude and direction.

Pressure:

Pressure is the force applied per unit area.
The concept of pressure explains why sharp objects like needles or knives can cut through materials more easily than blunt objects. This is because sharp objects concentrate the force over a small area, increasing pressure.
P=F/A

Where: P is pressure, F is the force applied and A is the area over which the force is distributed

Atmospheric Pressure:

The pressure exerted by this air is known as atmospheric pressure.

Force And Pressure Class 8 NCERT Science Topics

Force – A Push or Pull
Forces are due to an Interaction
Exploring Forces
A Force can Change the State of Motion
Force can Change the Shape of an Object
Contact Forces
Non-contact Forces
Pressure
Pressure Exerted by Liquids and Gases
Atmospheric Pressure

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure- Points to remember:

Force refers to a push or pull on an object caused by its interaction with another object.
Force can change the direction of an object's motion.
Force can also alter the shape of an object.
Force can affect the state of motion of an object.
Pressure is defined as the force applied per unit area.
The pressure exerted by the air around us is known as atmospheric pressure.
Although atmospheric pressure is very large, we don't feel it because the pressure inside our body is equal to the atmospheric pressure, balancing the external pressure.

There are so many interesting examples and situations that are given in the NCERT book grade eight-chapter 8. You can do all the activities given in the NCERT book and it will be a fun and a learning experience. CBSE NCERT solutions for class 8 science chapter 8 force and pressure helps students in solving homework problems also.

NCERT Chapter-Wise Solutions For Class 8th Science

The chapter-wise NCERT solutions for all the science chapters are listed here along with their links:

NCERT Solutions for Class 8 Science Chapter 1 Crop Production and Management

NCERT Solutions for Class 8 Science Chapter 2 Microorganisms: Friend and Foe

NCERT Solutions for Class 8 Science Chapter 3 Coal and Petroleum

NCERT Solutions for Class 8 Science Chapter 4 Combustion and Flame

NCERT Solutions for Class 8 Science Chapter 5 Conservation of Plants and Animals

NCERT Solutions for Class 8 Science Chapter 6 Reproduction in Animals

NCERT Solutions for Class 8 Science Chapter 7 Reaching the Age of Adolescence

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure

NCERT Solutions for Class 8 Science Chapter 9 Friction

NCERT Solutions for Class 8 Science Chapter 10 Sound

NCERT Solutions for Class 8 Science Chapter 11 Chemical Effects of Electric Current

NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena

NCERT Solutions for Class 8 Science Chapter 13 Light

NCERT Solutions For Class 8: Subject-Wise

Also Check NCERT Books and NCERT Syllabus here:

Frequently Asked Questions (FAQs)

1. Why is it easier to walk on sand with flat shoes than with high heels?

Flat shoes have a larger surface area, so the pressure exerted on the sand is less, making it easier to walk. High heels concentrate pressure in a small area, causing the heels to sink.

2. How does force affect the shape of an object?

A force can deform an object by changing its shape or size, such as stretching a rubber band or compressing a sponge.

3. Why are sharp knives more effective in cutting?

Sharp knives have a smaller area of contact, so the pressure applied is greater, making it easier to cut things.

4. Why do we slip on a wet floor?

A wet floor reduces friction, which is a type of contact force. Less friction means less grip, making it easier to slip.

5. What is contact force? Give examples.

Contact forces are those forces that act only when objects are physically touching each other.

Examples:

Muscular force (pushing a table)

Frictional force (brakes applied on a bicycle)

Also Read

NCERT Solutions for Class 8 Maths Chapter 6 Cubes and Cube Roots

NCERT Solutions for Class 8 Science Chapter 3 Coal and Petroleum

NCERT Solutions for Class 8 Science Chapter 4 Combustion and Flame

NCERT Solutions for Class 8 Maths Chapter 2 Linear Equations in One Variable

NCERT Solutions for Class 8 Science Chapter 13 Light

NCERT Solutions for Class 8 Science Chapter 12 Some Natural Phenomena

NCERT Books for Class 8 Maths 2025-26: Download PDF Here

NCERT Books for Class 8 Social Science 2025-26 - Download PDF

NCERT Books for Class 8 Science 2025-26 PDF - Download Now

NCERT Books for Class 8 English 2025-26: Download PDF

NCERT Books for Class 8 2025-26: Download All Subjects PDF

NCERT Syllabus for Class 8 2025-26, Download All Subjects Latest Syllabus PDF

NCERT Syllabus for Class 8 Hindi 2025-26: Download All Chapters PDF Here

Articles

How to join DRDO after 12th - A Complete Guide

May 02, 2025

Best Career Options For Girls - Check Eligibility, Salary, Qualification

Apr 28, 2025

Veterinary Courses after 12th - Eligibility Criteria & Top Institutes

Apr 26, 2025

Navyug School Admission 2025: Application, Last Date, Exam, Syllabus, Qualifying Marks

Apr 26, 2025

IB 2025 Exam Schedule: All exam zones (A, B, C)

Apr 26, 2025

5 Year Integrated Courses After 12th -Check Eligibility & Top Colleges

Apr 25, 2025

BHU School Entrance Test Admit Card 2025 - Download Class 9, 11 SET Admit Card @ bhuonline.in

Apr 24, 2025

Diploma courses after 12th Commerce - Check Eligibility, Duration, Top Colleges/institute

Apr 23, 2025

Upcoming School Exams

National Institute of Open Schooling 10th examination

Admit Card Date:02 April,2025 - 19 May,2025

Application Process

Exam Pattern

Mock Test

National Institute of Open Schooling 12th Examination

Admit Card Date:02 April,2025 - 19 May,2025

Application Process

Exam Pattern

Admit Card

National Means Cum-Merit Scholarship

Application Date:13 April,2025 - 07 May,2025

Application Process

Exam Pattern

Mock Test

Goa Board Higher Secondary School Certificate Examination

Admit Card Date:17 April,2025 - 17 May,2025

Exam Pattern

Admit Card

Result

Meghalaya Board of Secondary School Leaving Certificate Examination

Exam Date:01 May,2025 - 08 May,2025

Exam Pattern

Admit Card

Result

View All School Exams

Popular Questions

A block of mass 0.50 kg is moving with a speed of 2.00 ms^-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1) $0.34\; J$	Option 2) $0.16\; J$
Option 3) $1.00\; J$	Option 4) $0.67\; J$

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8×10⁷J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms⁻² :

Option 1)

2.45×10⁻³ kg

Option 2)

6.45×10⁻³ kg

Option 3)

9.89×10⁻³ kg

Option 4)

12.89×10⁻³ kg

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1) $2,000 \; J - 5,000\; J$	Option 2) $200 \, \, J - 500 \, \, J$
Option 3) $2\times 10^{5}J-3\times 10^{5}J$	Option 4) $20,000 \, \, J - 50,000 \, \, J$

A particle is projected at 60⁰ to the horizontal with a kinetic energy $K$ . The kinetic energy at the highest point

Option 1) $K/2\,$	Option 2) $\; K\;$
Option 3) $zero\;$	Option 4) $K/4$

In the reaction,

$2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}$

Option 1) $11.2\, L\, H_{2(g)}$ at STP is produced for every mole $HCL_{(aq)}$ consumed	Option 2) $6L\, HCl_{(aq)}$ is consumed for ever $3L\, H_{2(g)}$ produced
Option 3) $33.6 L\, H_{2(g)}$ is produced regardless of temperature and pressure for every mole Al that reacts	Option 4) $67.2\, L\, H_{2(g)}$ at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, $Mg_{3}(PO_{4})_{2}$ will contain 0.25 mole of oxygen atoms?

Option 1) 0.02	Option 2) 3.125 × 10^-2
Option 3) 1.25 × 10^-2	Option 4) 2.5 × 10^-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1) decrease twice	Option 2) increase two fold
Option 3) remain unchanged	Option 4) be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1) Molality	Option 2) Weight fraction of solute
Option 3) Fraction of solute present in water	Option 4) Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol^-1) is

Option 1) twice that in 60 g carbon	Option 2) 6.023 × 10²²
Option 3) half that in 8 g He	Option 4) 558.5 × 6.023 × 10²³

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t²) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m² , the number of rotations made by the pulley before its direction of motion if reversed, is