World 9 · Circular motion: curves, wheels and orbits · 9 min · PROMoving in a circle at a steady speed
v = 2πr/T and a = v²/r toward the centre
PRO · Forces & Motion
World 9: Circular motion: curves, wheels and orbits is part of PRO
The first world of Forces & Motion is free. PRO opens the other 50 lessons in 11 worlds — simulations, quizzes and all.
PRO includes
- All 26 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly