Kinematics describes how bodies move; dynamics asks why. The answer lies in forces: whenever a body accelerates, changes direction or deforms, there is a force responsible. This chapter classifies forces, introduces interaction diagrams as a tool for not forgetting any of them, states Newton’s three laws which are the heart of classical mechanics, and closes with friction.
Sections
- Forces in nature
- Interaction diagrams
- Newton’s three laws
- Friction
- Conclusion: the tools of mechanics