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World 10 · Momentum and collisions · 10 min · PRO

Momentum is conserved in every collision

p = m·v, before = after, but kinetic energy only when elastic

PRO · Forces & Motion

World 10: Momentum and collisions 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.

  • Stop dead: equal masses and impulse
  • How bouncy? Finding e with photogates
  • Billiards: momentum is a vector
  • Spring or pendulum: what sets the period?
  • Energy back and forth, and big swings
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