Tag
Orbits
Entries tagged orbits.
2 entries
Concept
Circular motion and inward acceleration
Moving at constant speed along a circle still requires acceleration, because velocity's direction is constantly changing, and that acceleration always points toward the center.
7 min
ConceptUniversal gravitation
Every two masses in the universe pull on each other with a force that grows with both masses and falls off as the square of the distance between them, the same law that governs a falling apple and a moon in orbit.
8 min