Khan Academy: 2757 products
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get …
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Physics: Introduction to tension (part 2)
A slightly more difficult tension problem. Physics Learn about the basic principles that govern the physical world around us. Solid underst…
VideoFree10 minutes
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Class 11 Physics (India): Formal and alternate form of the derivative
Sal introduces two ways of writing the limit expression for the derivative of a function at a point. Class 11 Physics (India) Let's learn, …
VideoFree5
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Physics: Lorentz transformation derivation part 1
Using symmetry of frames of reference and the absolute velocity of the speed of light (regardless of frame of reference) to begin to solve …
VideoFree11 minutes
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Class 11 Physics (India): Unit vectors and engineering notation
Using unit vectors to represent the components of a vector Class 11 Physics (India) Let's learn, practice, and master topics of class 11 ph…
VideoFree8 minutes
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Class 12 Physics (India): Introduction to circuits and Ohm's law
Introduction to electricity, circuits, current, and resistance Class 12 Physics (India) It is now time to dive deeper into the world of phy…
VideoFree10 minutes
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Class 11 Physics (India) - Hindi: Linear velocity comparison from radius and angular velocity: Worked example (Hindi)
Linear velocity from the radius and angular velocity for two pumpkin catapults with different arm lengths. Class 11 Physics (India) - Hindi…
VideoFree5
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Class 11 Physics (India): Introduction to gravity
Basics of gravity and the Law of Universal Gravitation Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physic…
VideoFree16 minutes
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Class 11 Physics (India): Pendulums
David explains how a pendulum can be treated as a simple harmonic oscillator, and then explains what affects, as well as what does not affe…
VideoFree15 minutes
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Physics: Floating magnet
Can you use a magnet as a compass? How can you find North vs. South pole? Physics Learn about the basic principles that govern the physical…
VideoFree1 minute
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Class 11 Physics (India): Identifying centripetal force for ball on string
Identifying forces or force components acting as the centripetal force for a ball on a string moving in a horizontal circle. Class 11 Physi…
VideoFree5
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Physics: Projectile on an incline
Challenging problem of a projectile on an inclined plane Physics Learn about the basic principles that govern the physical world around us.…
VideoFree18 minutes
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Class 11 Physics (India): Introduction to momentum
What momentum is. A simple problem involving momentum. Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physic…
VideoFree9 minutes
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Class 10 Physics (India): Refraction in water
Refraction in Water Class 10 Physics (India) Let's explore the mysteries of light and electricity. From how light reflects to correcting de…
VideoFree4 minutes
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Electrical engineering: What is inside an alarm clock radio?
In this video we explore what is inside an alarm clock, how it is made, and how it works. Electrical engineering Learn about electricity, c…
VideoFree14 minutes
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Class 11 Physics (India) - Hindi: Angular velocity and speed (Hindi)
An intuition for the relationship between the formulas for angular velocity and speed, including a worked example of calculating angular ve…
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