Khan Academy: Understanding Net Forces

Pass along the knowledge of the great Sir Isaac Newton with this learning exercise on the laws of motion. Including three separate problems, each involving multiple parts and calculations, this resource is a great...

Sal defines and compares tension, weight, friction and normal forces using free body diagrams. [8:03]

Review the key concepts and skills for forces, including how to draw free body diagrams.

This article explains the buoyant force using a submarine as an example. It also discusses what determines the size of the buoyant force using a formula, and explains decompression sickness better known as the bends.

Looks at how to discern whether molecules are polar or non-polar, and how to apply that polarity to intermolecular forces. [8:35]

[Free Registration/Login may be required to access all resource tools.] Understand the physics that occurs in a game of tug-of-war.

Using the Cartesian coordinate system, future flight experts plot points to determine whether or not an airplane will fly. With the four forces of weight, lift, drag, and thrust represented in different quadrants, your physics learners...

Identifying forces or force components acting as the centripetal force for a car driving in a horizontal circle, a car driving in a vertical circle, and a satellite in orbit.

Identifying forces or force components acting as the centripetal force for a ball on a string moving in a horizontal circle. [5:05]

A lesson about friction can be found on this website. Students will experiment to see how motion and frictional force affect the game of football.