A video and quiz on how force must overcome inertia in order to produce motion.

A video exploring how playgrounds how a place to study forces. Learn about how gravity, Newton's laws, and forces can be found as you play. [3:37]

Zog is introduced to Newton's basic laws of motion. By observing objects on earth and in space, Zog learns that nothing can start moving, speed up, slow down, change direction or stop unless a force is applied to it -- even if the force...

In this animated video, students learn about mass: the measure of an object's ability to resist being accelerated by a force. [1:46]