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 Jun 26, 2025 03:37 PM IST

Opening a door, kicking a ball or pushing a switch, all activities in everyday life require forces. It is fundamental in understanding how we interact with the world around us. We also understand how forces affect the state of motion and how they can deform some objects. The NCERT Solutions of Class 8 Science chapter Force and Pressure discusses the various forms of forces, the result of such forces and the concept of pressure.

This Story also Contains

NCERT Solutions for Class 8 Science Chapter 8: Download PDF
NCERT Solutions for Force and Pressure Class 8: Exercise Questions
NCERT Solutions for Class 8 Science Chapter 8: Topics
NCERT Solutions for Class 8 Science Chapter 8: Important Concepts
Points to Remember in NCERT Class 8 Science Chapter 8

NCERT Solutions for Class 8 Science Chapter 8 Force and Pressure

The 10 exercise questions in the NCERT Solutions of Science Chapter 8 are a mix of simple question-and-answer and fill-in-the-blanks. They are answered in detail by Careers360 experts to help you understand this chapter and are created in clear and easy-to-follow steps, suitable for students to prepare for exams. You can also find the important concepts and the points to remember from the chapter below, which are useful for revision and viewing the concepts covered in the chapter at a glance. The NCERT Solutions of class 8 chapter Force and Pressure, is also available in PDF format for students to download.

NCERT Solutions for Class 8 Science Chapter 8: Download PDF

Download the NCERT Solutions for class 8 Science chapter Force and Pressure using the link below. The PDF version is well-suited for anytime access and last-minute revision.

NCERT Solutions for Force and Pressure Class 8: 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.

NCERT Solutions for Class 8 Science Chapter 8: Topics

The topics in Chapter 8 of NCERT Class 8 science are as follows-

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: Important 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.

Points to Remember in NCERT Class 8 Science Chapter 8

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.

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 Maths Chapter 7 Comparing Quantities

NCERT Solutions for Class 8 Maths Chapter 5 Squares and Square Roots

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

NCERT Solutions for Class 8 Maths Chapter 3 Understanding Quadrilaterals

NCERT Solutions for Class 8 Maths Chapter 1 Rational Numbers

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

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

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

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

NCERT Books for Class 8 English 2025-26: Download 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

SoSE Delhi School Admission 2025: Class IX (STEM) Result (Declared), Check Selection Process

Jul 11, 2025

MGGS School Admission Form 2025: Apply Online for Admission

Jul 11, 2025

Cambridge IGCSE Exam Date 2025: June & November Session (Zone 4)

Jul 10, 2025

Cambridge Board Admit Card 2025: IGCSE, O Level, International A Level and Pre-U level Exam

Jul 10, 2025

Cambridge Time Table 2025-26: IGCSE, O Level, International A Level and Pre-U level Exam Dates

Jul 10, 2025

UPTAC Seat Allotment 2025 - Dates (Out), Fee, Seat Acceptance, Reporting

Jul 10, 2025

UPTAC Counselling 2025: Registration (Started), Date, Seat Allotment, Choice Filling, Document Verification

Jul 10, 2025

DU LLB Counselling 2025 (Started) – Third Allotment (Out), Documents, Admission Process

Jul 10, 2025

Upcoming School Exams

Maharashtra Higher Secondary School Certificate Examination

Exam Date:24 June,2025 - 16 July,2025

Admit Card

Mock Test

Result

Haryana Board of Secondary Education 10th Examination

Admit Card Date:27 June,2025 - 14 July,2025

Mock Test

Result

Admit Card

Indian School Certificate 12th Examination

Exam Date:01 July,2025 - 17 July,2025

Mock Test

Result

Exam Pattern

Bihar Open Board 10th Examination

Late Fee Application Date:01 July,2025 - 15 July,2025

Result

Admit Card

Bihar Open Board 12th Examination

Late Fee Application Date:01 July,2025 - 15 July,2025

Result

Admit Card

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