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World 9 · Circular motion: curves, wheels and orbits · 9 min · PRO

Ferris wheel and satellites: feeling lighter

Apparent weight N = m(g ∓ v²/r), and v = √(GM/r) in orbit

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.

  • Moving in a circle at a steady speed
  • A car on a flat curve
  • The banked curve
  • Momentum is conserved in every collision
  • Stop dead: equal masses and impulse
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  • Practice exams and certificates

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