What this chapter is about
Chapter 5 gave us the three laws. Chapter 6 brings them to more realistic worlds: circular-motion dynamics, rotating frames, air resistance. Where the "frictionless horizontal surface" assumption gets dropped.
Sections
- 6.1 — Newton's laws revisited for applications
- 6.2 — Dynamics of circular motion — centripetal force
- 6.3 — Non-uniform circular motion
- 6.4 — Non-inertial frames and fictitious forces
- 6.5 — Air drag and terminal velocity
- 6.6 — Fundamental forces of nature
- 6.7 — Worked problems
- 6.8 — Practice problems
- 6.9 — Q&A
Prerequisites
- Chapter 4 — circular motion (centripetal acceleration)
- Chapter 5 — Newton's laws, friction, inclined planes
- Derivatives and integrals — for drag (§6.5)
Why this chapter matters
Newton's laws are powerful, but real problems need extra care. At what speed does a car slip in a turn? At what speed does a skydiver reach terminal velocity? Why does water fly outward in a washing machine? All of these live in Chapter 6.
Connection to later chapters
- Ch 7 — work and energy
- Ch 9 — momentum
- Ch 11 — rotational motion (broad use of centripetal force)
- Ch 15 — gravitation (centripetal force for satellites)
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