CK-12 Foundation
Ck 12: Friction
[Free Registration/Login may be required to access all resource tools.] In this module, students learn what causes friction, what factors affect friction, and how it is calculated.
Other
Bscs: Forces and Motion Content Background Document
In this document, we will try to answer a fundamental question of physical science, "Why do things start to move, slow down, speed up, stop moving or change direction?" In answering these core questions we can develop concepts that can...
CK-12 Foundation
Ck 12: Physical Science: Types of Friction
[Free Registration/Login may be required to access all resource tools.] The four types of friction and how they act on objects.
Science4Fun
Science4 Fun: What Is Friction
What is friction? Illustrated discussion of friction including the three types, its importance, and why it is avoided.