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World 10 · Momentum and collisions · 10 min · PRO

How bouncy? Finding e with photogates

e = speed of separation ÷ speed of approach

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.

  • Momentum is conserved in every collision
  • Stop dead: equal masses and impulse
  • Billiards: momentum is a vector
  • Spring or pendulum: what sets the period?
  • Energy back and forth, and big swings
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

Unlock Forces & MotionTry the free world
← Stop dead: equal masses and impulseBilliards: momentum is a vector →

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