CBSE Class 9 Physics Notes 2023-24
Last Updated : 19 Dec, 2023
CBSE Class 9 Physics Notes 2023-24 is a comprehensive guide for CBSE class 9 Students. The Class 9 Syllabus is Designed to provide Students with a strong foundation in the basic principle of physics including Force, Law of Motion, Gravitation and Sound, and to encourage them to think scientifically. Our Class 9 Science Notes help Students study smartly and get a clear picture of each and every concept discussed in their syllabus. The notes also contain neatly illustrated examples for quick revision of important topics from NCERT, as well as some sample questions to aid better understanding.
GeeksforGeeks has created a new approach to school learning. Physics has been among the crucial subjects of the Class 9 Science Syllabus. It helps students in improving their understanding of fascinating concepts. The understanding of how motion, force, work, sound, gravity, energy, and power interact with one another and impact our lives. GeeksforGeeks prepared in-depth subject theory to have a solid foundation in Class 9 Physics. The below-listed articles are designed in such a way that you study everything according to your NCERT textbook, or reference books.
Students can also check CBSE Class 9 Physics Notes for Other Chapters and educate themselves on various subjects through the following resources:
CBSE Class 9 Physics Notes 2023-24 - Chapters List
|
| Chapter 1: Motion |
| Chapter 2: Force and Law of Motion |
| Chapter 3: Gravitation |
| Chapter 4: Work and Energy |
| Chapter 5: Sound |
CBSE Class 9 Physics Notes Chapter 1 - Motion
The first chapter in the Physics curriculum of Class 9 is Motion. Motion means movement. Motion is defined as the change in position of an object with respect to its surrounding in a given interval of time. This chapter forms the basic idea of kinematics for students to learn in further classes. Therefore, CBSE Class 9 Physics notes elaborate on distance and displacement, uniform and non-uniform motion, speed, velocity, and accelerated and decelerated motion. It also explains the equation of motion with a graphical representation of motion and uniform circular motion as listed below:
CBSE Class 9 Physics Notes Chapter 2 - Force and Laws of Motion
Force and Laws of Motion is the second chapter in the Class 9 Physics Syllabus. These notes explain the concept of force, its effects, balanced and unbalanced force, laws of motion, and Newton’s laws of motion. It further offers a detailed explanation of mass and inertia, momentum and mass, and its unit along with numerical problems for practice. The notes also explain the second law of motion and the third law of motion. Below are the listed articles on Force and Laws of Motion:
CBSE Class 9 Physics Notes Chapter 3 - Gravitation
The third chapter of the Physics in Science syllabus of Class 9 is Gravitation. Gravitation is the universal force of attraction acting between all matter. GeeksforGeeks crucial notes explain Newton’s universal law of gravitation, mass, weight, and the difference between mass and weight. The notes further provide solved numerical problems, which are discussed in the articles listed below:
CBSE Class 9 Physics Notes Chapter 4 - Work and Energy
Work and Energy is the fourth chapter in the Physics syllabus and so an important chapter to understand to solve mechanics in further classes. The notes talk about work, a condition when the work should be and when not, and its unit, along with positive, negative, and zero work. The notes also elaborate on energy, its types, the law of conservation energy, power, and a commercial unit of power and provide solved Numericals, discussed in the articles mentioned below:
CBSE Class 9 Physics Notes Chapter 5 - Sound
The last chapter in the Class 9 Physics Syllabus is Sound. Sound is heard every day from various sources like humans, birds, bells, machines, TV, radios, etc. The notes elaborate production and propagation of sound, sound waves as longitudinal waves, their characteristics, wavelength, frequency, time period, amplitude, and velocity. Various other concepts of the speed of sound in multiple mediums, sonic boom, echo, a reflection of sound, range of hearing, application of ultrasound, sonar, and structure of the human ear are also explained in the article listed below:
Conclusion
CBSE Class 9 Physics Notes are an essential tool for Class 9th Students for their Exam preparation. With our CBSE Science Notes, Students can easily focus on physics and Important NCERT topics and retain knowledge effectively. The well-crafted notes, with neat examples, provide a complete overview of All chapters for quick revision. By using our CBSE class 9 science notes, students can achieve higher marks in exams and experience a smooth learning journey.
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CBSE Class 9 Physics Notes 2023-24 CBSE Class 9 Physics Notes 2023-24 is a comprehensive guide for CBSE class 9 Students. The Class 9 Syllabus is Designed to provide Students with a strong foundation in the basic principle of physics including Force, Law of Motion, Gravitation and Sound, and to encourage them to think scientifically.
6 min read
Chapter 1: Motion
Measuring the Rate of MotionWe use general things around us that are moving, like if we see around us, monitor air moving around us, like we have clocks with the hands moving, we all know that day and night is caused because of motion of Earth around the Sun, yet seasons are caused because of it. So we are going to study in de
10 min read
Velocity - Time GraphsAnything that contains Kinetic energy is in some type of motion, whether it is one-dimensional, two-dimensional, rotational motion, etc. Kinetic energy is responsible for motion, and it is already known that the motion of any object happens because of some external force, the inertia present in the
7 min read
Equation of Motion by Graphical MethodA famous British scientist Isaac Newton derived three equations of motion that describe the most fundamental concepts of motion of an object. These equations govern the motion of an object in one, two, and three dimensions. These equations are easily used to calculate the values or the expressions f
12 min read
Uniform Circular MotionUniform Circular Motion as the name suggests, is the motion of a moving object with constant speed in a circular path. As we know, motion in a plane only has two coordinates, either x, and y, y and z, or z and x. Except for Projectile motion, circular motion is also an example of motion in a 2-D pla
9 min read
Chapter 2: Force and Laws of Motion
Force - Definition, Effects, Types, Sample ProblemsIn everyday life, we often notice that some effort is required to set an object in motion or to bring a moving object to a stop. This effort is experienced as a muscular force, where we push, pull, or hit the object to change its state of motion. Therefore, Force can be defined as a push, pull, or i
12 min read
Balanced and Unbalanced ForcesForces are required to move, turn, shift, release, shut, drive, drag, and so on. When you throw a ball, you are exerting energy on it to propel it through the air. A push or pull is referred to as a force. Forces can cause objects to move, and they can also slow, stop, or change the direction in whi
8 min read
Newton's First Law of MotionBefore the revolutionary ideas of Galileo and Newton, people commonly believed that objects naturally slowed down over time because it was their inherent nature. This assumption stemmed from everyday observations, where things like friction, air resistance, and gravity seemed to slow moving objects.
15+ min read
Mass and InertiaMany events are seen in the field of physics, yet some of them have eluded explanation for a long time. Newton proposed three rules of motion, which became known as Newton's Laws of Motion. These laws were a novel finding in the physical universe, and they were frequently employed to explain situati
8 min read
Newton's Second Law of Motion: Definition, Formula, Derivation, and ApplicationsNewton's Second Law of Motion is a fundamental principle that explains how the velocity of an object changes when it is subjected to an external force. This law is important in understanding the relationship between an object's mass, the force applied to it, and its acceleration.Here, we will learn
15 min read
Law of Action and ReactionLaw of Action and Reaction is the other name for Newton's Third Law of Motion. There are three basic laws given by famous English Physicist Isaac Newton that are helpful in defining the motion of any object in an inertial frame of reference. The third law of Newton is also called the Law of Action a
11 min read
Conservation of MomentumAssume a fast truck collides with a stopped automobile, causing the automobile to begin moving. What exactly is going on behind the scenes? In this case, as the truck's velocity drops, the automobile's velocity increases, and therefore the momentum lost by the truck is acquired by the automobile. Wh
12 min read
Chapter 3: Gravitation
Newton's Universal Law of GravitationWhether or not that apple actually landed on Isaac Newton's head, as some stories would have it, this equation given by universal law of gravitation describes why everyone stays rooted to the ground, what locks the Earth in orbit around the sun, and to send men to the moon. It summarizes the idea th
7 min read
Kepler's Laws of Planetary MotionKepler's law of planetary motion is the basic law that is used to define the motion of planets around the stars. These laws work in parallel with Newton's Law and Gravitation Law and are helpful in studying the motion of various planetary objects. Kepeler's law provides three basic laws which are, K
10 min read
Acceleration due to GravityAcceleration due to gravity (or acceleration of gravity) or gravity acceleration is the acceleration caused by the gravitational force of attraction of large bodies. As we know that the term acceleration is defined as the rate of change of velocity with respect to a given time. Scientists like Sir I
8 min read
What is the Acceleration due to Gravity on Earth ?Take something in your hand and toss it down. Its speed is zero when you free it from your grip. Its pace rises as it descends. It flies faster the longer it goes. This sounds like acceleration. Acceleration, on the other hand, implies more than just rising speed. Pick up the same object and throw i
11 min read
Mass and WeightMass and Weight are commonly used in the same manner by the general masses but there are differences between both Mass and Weight, where Mass is the measure of Inertia unlike Weight which is a measure of force acting on a body towards the heavy body. But yet still many people use these two terms int
10 min read
Buoyant ForceBuoyancy is a phenomenon due to the buoyant force that causes an object to float. When you put an object in a liquid, an upward force is exerted on the object by the liquid. This force is equal to the weight of the liquid that has been displaced. The amount of liquid that has been displaced depends
13 min read
Relative DensityDensity is defined as the amount of mass in a unit volume of matter, for every substance has a different density. Here, we will cover what relative density is, calculations related to relative density, and the density of various substances. Observe how the different liquids form different layers. Th
12 min read
Chapter 4: Work and Energy
Work - Definition, Formula, Types of Work, Sample ProblemsIn daily life, you are doing activities like study, running speaking, hear, climbing, gossips with friends and a lot of other things. Do you know? All these activities require some energy, and you get it from your daily food. In our day-to-day life, everyone eats food, gets energy, and does some act
6 min read
EnergyEnergy in Physics is defined as the capacity of a body to do work. It is the capacity to complete a work. Energy can be broadly categorized into two categories, Kinetic Energy and Potential Energy. The capacity of an object to do the work is called the Energy. In this article, we will learn about, E
10 min read
Kinetic EnergyKinetic Energy is the energy associated with an object moving with a velocity. For an object of mass m and velocity, its kinetic energy is half of the product of the mass of the object with the square of its velocity. In our daily life, we observe kinetic energy while walking, cycling, throwing a ba
10 min read
Potential EnergyPotential energy in physics is the energy that an object possesses as a result of its position. The term Potential Energy was first introduced by a well-known physicist William Rankine, in the 19th century. Gravitational Potential Energy, the elastic potential energy of an elastic spring, and the el
8 min read
PowerPower in Physics is defined as the time rate of the amount of energy converted or transferred. In the SI system (or International System of Units), Watt (W) is the unit of Power. Watt is equal to one joule per second. In earlier studies, power is sometimes called Activity. Power is a scalar quantity
8 min read
Commercial Unit of EnergyIn daily life, from moving to completing a task, humans keep on getting some work done all the time. However, how to define the term 'work' in Physics? A man is walking, is this Work? Someone pushing a wall, will this be called a work done? Well, in real life, perhaps, both the examples look like th
6 min read
Chapter 5: Sound
Production and Propagation of SoundHave you ever wonder how are we able to hear different sounds produced around us. How are these sounds produced? Or how a single instrument can produce a wide variety of sounds? Also, why do astronauts communicate in sign languages in outer space? A sound is a form of energy that helps in hearing to
6 min read
Sound Needs a Medium for PropagationWithout sound life is a little tough, isn't it? Like imagine watching a horror movie without sound you will realize that the scary movie becomes a funny video compilation. We are totally connected to sound, from morning to our bedtime we hear several sounds some sounds good but at the same time, som
6 min read
What are the Characteristics of Sound Waves?Sound is nothing but the vibrations (a form of energy) that propagates in the form of waves through a certain medium. Different types of medium affect the properties of the wave differently. Does this mean that Sound will not travel if the medium does not exist? Correct. It will not, It is impossibl
7 min read
Speed of SoundSpeed of Sound as the name suggests is the speed of the sound in any medium. We know that sound is a form of energy that is caused due to the vibration of the particles and sound travels in the form of waves. A wave is a vibratory disturbance that transfers energy from one point to another point wit
12 min read
Reflection of SoundReflection of Sound is the phenomenon of striking of sound with a barrier and bouncing back in the same medium. It is the most common phenomenon observed by us in our daily life. Let's take an example, suppose we are sitting in an empty hall and talking to a person we hear an echo sound which is cre
9 min read
Reflection of SoundReflection of Sound is the phenomenon of striking of sound with a barrier and bouncing back in the same medium. It is the most common phenomenon observed by us in our daily life. Let's take an example, suppose we are sitting in an empty hall and talking to a person we hear an echo sound which is cre
9 min read
Explain the Working and Application of SONARSound energy is the type of energy that allows our ears to sense something. When a body vibrates or moves in a ‘to-and-fro' motion, a sound is made. Sound needs a medium to flow through in order to propagate. This medium could be in the form of a gas, a liquid, or a solid. Sound propagates through a
8 min read
Human EarIt has been discovered that sound is a type of energy. Vibrations cause it to happen. Longitudinal waves are sound waves. Because they are elastic waves, they must be transmitted through a material medium. They can move through solids, liquids, and gases. In solids, their velocity is greatest, where
8 min read