NCERT Solutions for Class 9 Science Chapter 8

You can opt for Chapter 8 - Motion NCERT Solutions for Class 9 Science PDF for Upcoming Exams and also You can Find the Solutions of All the Maths Chapters below.

NCERT Solutions for Class 9 Science

• Chapter 1 - Matter in Our Surroundings

• Chapter 2 - Is Matter Around us Pure

• Chapter 3 - Atoms and Molecules

• Chapter 4 - Structure of Atom

• Chapter 5 - The Fundamental Unit of Life

• Chapter 6 - Tissues

• Chapter 7 - Diversity in Living Organisms

• Chapter 8 - Motion

• Chapter 9 - Force and Laws of Motion

• Chapter 10 - Gravitation

• Chapter 11 - Work and Energy

• Chapter 12 - Sound

• Chapter 13 - Why do We Fall ill

• Chapter 14 - Natural Resources 

• Chapter 15 - Improvement in Food Resources

According to experts, everything in this universe is constantly moving. This means that even if you are completely still, then you are still standing or sitting on earth that is constantly in motion around the sun and its axis.

Motion can be defined as any change that is in the position of an object about time. In physics NCERT solutions class 9 science chapter 8, motion can be explained as the change in the position of an object in respect to its surroundings in any given interval of time.

It is also mentioned in the class 9 chapter 8 science book that the motion of an object, which has some mass, can be expressed in terms of displacement, distance, time, acceleration, time, velocity, and speed.

There are many examples of motion, including a book that is falling from a table, the flow of water from a tap, rattling of windows, and the rapid flapping of a flag. These examples can be mentioned in class 9 science chapter 8 solutions.

It should be noted that even the air that we breathe exhibits motion. The fundamental particles of matter that are present in everything are also in a state of constant motion. It is also possible for motion to be either slow or swift.

Readers might also be interested to learn that displacement can be defined as the shortest distance between the final and initial position. These definitions and concepts can come in handy to solve NCERT class 9 science chapter 8 questions.

There Are Also Other Examples of Motion. Some of Those Examples Are

• The flow of air around everybody and the flow of air in and out of lungs

• Various daily activities like running, walking, and closing the door

• The vehicles that carry individuals or passengers from one location to another location. In this case, there is a change in the position of the passengers from one place to another

Students should be familiar with all the basic definitions and examples of motion. This information can be used for writing NCERT class 9 science chapter 8 solutions.

The Types of Motion

According to various class 9 science ch 8 solutions, the motion of an object is directly related to the type of force that is acting on the body. This means that there can be different types of motions. Do you know what those different types of motions are? If you don’t, then go through the list that is mentioned below.

• Translational Motion

Translational is a type of motion in which the object moves along a path that is carved out in any of three dimensions.

• Rotational Motion

Rotational is a type of motion in which the object is moved along a circular path. This object has a fixed axis. It is also known as rotatory motion. Some examples of rotational or rotatory motion are:

1. The motion of the earth around its axis and the sun

2. The motion of the wheels and steering wheel about its axis. This motion can be seen when one is driving a car

• Linear Motion

Linear is a type of translational motion. In this type of motion, the body moves along a single direction in a single dimension. It can also be defined as the type of motion in which the body moves from one point to another in a curved path or straight line.

There are also two different types of linear motions based on the path of the motion. And those types of linear motions are:

1. Rectilinear Motion: The path of this motion is along a straight line

2. Curvilinear Motion: The path of motion is curved

According to the ch 8 class 8 science book, some examples of linear motion are the motions of a football, train, and a car running on a road.

• Periodic Motion

Periodic motion is a type of motion in which the motion repeats itself after certain intervals of time.

• Simple Harmonic Motion

Simple harmonic motion is similar to the motion of a simple pendulum. In this motion, there is a restoring force that acts in the direction that is opposite to the direction of motion of the object. 

The value of the restoring force is also proportional to the displacement of the object from its mean position. Students should be familiar with this type of motion if they want to write NCERT solutions for class 9 science motion chapter correctly.

• Projectile Motion

In this type of motion, there is a horizontal displacement as well as vertical displacement.

• Oscillatory Motion

Oscillatory motion is repetitive, and it exists within a time frame. If the oscillatory motion is mechanical, then it is known as vibration. This motion exists around the mean position of a body.

Students should also be familiar with examples of oscillatory motion if they want to answer all chapter 8 science class 9 NCERT solutions correctly. Some of those examples are mentioned below.

• When a child is playing on a swing and is pushed. The swing moves in a to and fro motion about its mean position

• The pendulum of a clock that moves to and fro about its mean position

• The strings of the guitar, when the instrument is strummed, moves in a to and fro motion about its mean position

The Laws of Motion

There are many questions related to laws of motion in the NCERT book. Students often face challenges in answering those questions. This is where the class 9 science chapter 8 NCERT solutions pdf might be of help.

Students can download NCERT class 9 science ch 8 solutions from Vedantu for free. The class 9 NCERT science chapter 8 solutions are written by the most talented experts in India and can help students to score good marks.

For now, let’s focus on understanding the laws of motion given by Newton. Newton’s laws of motion are mentioned below.

• First Law

The first law states that any object that remains in its existing state of motion or rest unless a net external force is applied on the object.

• Second Law

The second law states that an object that has a certain mass, the greater the mass of the object, the greater will be the force that will be required for accelerating the object. This law can be depicted by the equation F = ma.

In this equation, ‘F’ is the force on the object, ‘m’ is the mass of the object, and ‘a’ is the acceleration of the object.

• Third Law

According to the third law of motion, for every action, there is an equal and opposite reaction.

It should also be noted that there are some limitations to these laws. However, these laws still hold in the current world.

Students should also learn the NCERT solutions for class 9 science ch 8 to score good marks. Students can download NCERT Solutions for class 9 chapter 8 science pdf from Vedantu.