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Momentum Calculator

Enter mass and speed — momentum and kinetic energy update instantly.

Formula

p = m · v | KE = ½mv² (p in kg·m/s = N·s)

Example

A 1500 kg car at 25 m/s: p = 37,500 kg·m/s, KE = 469 kJ.

FAQ

Momentum vs kinetic energy — what is the difference?

Momentum (mv) is a vector that is conserved in collisions; kinetic energy (½mv²) is a scalar that can convert to heat and deformation. Crash analysis needs both.

Why do airbags help?

They extend the stopping time. For the same momentum change, a longer Δt means smaller force (F = Δp/Δt).