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Momentum calculator

Linear momentum from mass and velocity, and the average force needed to stop it in a given time.

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Momentum 375 kg·m/s

How it works

p = m × v · F = p ÷ t

Momentum is mass times velocity, and the total is conserved in collisions. Stopping something means removing all of its momentum: do it in half the time and the average force doubles. That’s the reason for crumple zones, airbags and bending your knees when you land.

  1. p = m × v 75 kg × 5 m/s = 375 kg·m/s
  2. F = p ÷ t 375 ÷ 0.1 s = 3,750 N

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