Class 9th physics notes

Motion

Motion is a fundamental concept in physics that describes the change in position of an object with respect to time. Here are some key points covered in this chapter: Equations of Motion, Graphical Representation of Motion, Speed and Velocity, acceleration, etc.

Force and laws of motion

A force is a push or pull that changes or tends to change the state of an object. It can change the object’s speed, direction, or shape. Here we cover all topics of NCERT. Types of Forces, Laws of Motion, Inertia, Momentum, Applications and Examples, etc

Work and energy

Work is done when a force acts on an object and the object moves in the direction of the force. It can be calculated using the formula. Energy is the capacity to do work. It can exist in various forms, such as kinetic energy, potential energy, thermal energy, and more. Here we cover all topics of NCERT.

Sound

Sound is a form of energy that is produced by vibrating objects and travels through a medium (such as air, water, or solids) as a wave. Characteristics of Sound, Reflection of Sound, Structure of the Human Ear, Hearing Mechanism, etc.

Gravitation

Gravitation is the force of attraction between any two masses in the universe. It is responsible for keeping the planets in orbit around the Sun and the Moon in orbit around the Earth. Here we cover all topics of NCERT such as Universal Law of Gravitation, Mass and Weight, Gravitational Potential Energy, free fall, Applications and Examples, etc.