University of Colorado
University of Colorado: Ph Et Interactive Simulations: Forces and Motion: Basics
Explore the forces at work when pulling against a cart, and pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects.
TeachEngineering
Teach Engineering: What Is Newton's Second Law?
After a review of force, types of forces, and Newton's first law, students are introduced to Newton's second law of motion: force = mass x acceleration.
Texas Education Agency
Texas Gateway: What Is Force?
You have probably heard the word "force" before in conversations. Here are a few examples: "the rocket had a lot of force at blast off" or "the force of the storm blew the roof off the building." What is force? Force is defined as a push...
Scholastic
Scholastic: Study Jams! Science: Forces and Motion: Acceleration
A video and a short quiz on acceleration.