Khan Academy: 2757 products

Our ancestors noticed that certain rocks were attracted to each other. They also noticed that this force could be transferred onto certain …

Ram shows the easier way to find the acceleration of two masses connected by a rope. Class 11 Physics (India) - Hindi To help students who …

Sal finds the limit of (x²+x-6)/(x-2) at x=2 by factoring and simplifying the expression. Class 11 Physics (India) Let's learn, practice, a…

What is the acceleration due to gravity at the space station? Class 11 Physics (India) - Hindi To help students who prefer to learn by watc…

Calculating electron energy for levels n=1 to 3. Drawing a shell model diagram and an energy diagram for hydrogen, and then using the diagr…

Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane Class 11 Ph…

Evaluating a function at x=-1 using the graph of that function. Class 11 Physics (India) Let's learn, practice, and master topics of class …

Function values can be positive or negative, and they can increase or decrease as the input increases. Here we introduce these basic proper…

David explains how to read an acceleration vs. time graph. He then shows how the area under the curve gives the change in velocity and does…

Sal introduces the Constant rule, which says that the derivative of f(x)=k (for any constant k) is f'(x)=0. He also justifies this rule alg…

In this video Ram explains how to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. He a…

How fast does sound actually travel? Class 11 Physics (India) Let's learn, practice, and master topics of class 11 physics (NCERT) starting…

David explains how to determine the normal force for a variety of scenarios (extra forces, diagonal forces, acceleration) involving a shoe …

Class 12 Physics (India) It is now time to dive deeper into the world of physics with topics from class 12 (NCERT) such as electrostatics, …

The RC step response is an exponential curve. We set up the circuit and create the differential equation we need to solve. We introduce the…