This lesson explains how friction is part of the net force acting on an object. It is 2 of 2 in the series titled "Friction & Net Force."

This lesson explains how friction is part of the net force acting on an object. It is 1 of 2 in the series titled "Friction & Net Force."

This lesson introduces the concept of normal forces. It is 2 of 2 in the series titled "Normal Force."

This lesson explains why static friction depends on normal forces. It is 1 of 2 in the series titled "Static Friction & Normal Forces."

Moving on to the unit on the Physics of Electricity, it's time to talk about charge. What is charge? Are there positive and negative charges? What do those things mean? In this video episode, Shini talks about electrostatic forces,...

This lesson provides the learner with example problems involving tension forces. It is 1 of 2 in the series titled "Practice w/ Tension Forces."

This lesson provides the learner with example problems involving tension forces. It is 2 of 2 in the series titled "Practice w/ Tension Forces."

The video lesson is from Khan Academy's physics library. This lesson answers the question: What would happen to a slowly moving frozen sock on a frictionless planet.

Mr. Andersen shows you how to draw free body diagrams of various objects. The major forces (like gravity, normal, tension, friction, air resistance, etc.) are discussed and then applied to various problems.