Skip to content
World 10 · Momentum and collisions · 10 min · PRO

Stop dead: equal masses and impulse

Elastic, equal masses, one at rest: the velocities swap. J = Δp = F·Δt

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
  • 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
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
← Momentum is conserved in every collisionHow bouncy? Finding e with photogates →

Report a mistake

What is wrong?
0 / 2000 · at least 10 characters
Sent along with your report
  • Page
  • About Stop dead: equal masses and impulse — Forces & Motion · physicslab/momentum-stop-dead
Plus your browser type. Reports go to our support system; see the privacy notice.