§8.5 — Non-Conservative Forces
Not all forces are conservative. Friction, air drag, and other dissipative forces depend on velocity and cannot be derived from a potential energy…
§8.4 — Energy Conservation
One of the most powerful principles in physics is the conservation of mechanical energy: when only conservative forces act on a system, the total…
§8.3 — Elastic PE
Springs, rubber bands, and deformable solids store energy when stretched or compressed. This energy is elastic potential energy, and it obeys a…
§8.2 — Gravitational PE
Gravitational potential energy takes two fundamentally different forms depending on the scale of the system. Near Earth’s surface (where $h ll RE$,…
§8.1 — PE Functions
Chapter 7 introduced the concept of potential energy for conservative forces and showed how it connects to work via $W = -Delta U$. This chapter…
Chapter 8 — Potential Energy and Conservation of Energy
Gravitational and elastic potential energy, conservation of mechanical energy, non-conservative forces, and energy diagrams fully analyzed.
Chapter 7 — Q&A
Here are questions that often come up while learning this chapter — with short, clear answers. Questions are ordered from foundational to advanced.…
Chapter 7 — Flashcards
Work and Energy — the bridge between forces and transformations! Master work, kinetic energy, potential energy, and power with these cards. ⚡
§7.6 — Power
Energy conservation tells us how much energy is transferred in a process, but not how fast. Power measures the rate at which energy is transferred or…
§7.5 — Energy Conservation
One of the most powerful principles in physics is the conservation of mechanical energy: when only conservative forces act, the total mechanical…