Physics · Classical
Gravity & Orbits
Why the Moon doesn't fall down (it does, it just keeps missing). Newton's law of gravitation, Newton's cannon, orbital speed and period, Kepler's laws, geostationary orbits and escape velocity, worked with real numbers for the ISS and GPS.
Step 1 of 6 · Overview35 min read ·
Key idea
Prereqs: Forces & Newton's laws; Energy & momentum. Next: Waves & sound. Follows Crash Course Physics #8, OpenStax *University Physics* vol. 1 ch. 13 and NASA's orbital mechanics primers.Next: 1. Universal gravitation