Impulse J is the product of force and time (J = F Δt) or the change in momentum (J = m Δv). It has units N·s or kg·m/s.

When to use F Δt vs m Δv?

Use F Δt when you know force and contact time; use m Δv when you know mass and change in velocity.

Online Impulse Calculator

Compute impulse J = F × Δt (force × time) or J = m × Δv (mass × change in velocity). Units: N·s or kg·m/s.

Formula

J = F × ΔtJ = m × Δv

F (force, N)

Δt (time, s)

What is impulse?: Impulse J is the product of force and time (J = F Δt) or the change in momentum (J = m Δv). It has units N·s or kg·m/s.
When to use F Δt vs m Δv?: Use F Δt when you know force and contact time; use m Δv when you know mass and change in velocity.

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