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Momentum is the product of mass and velocity, while impulse is the change in momentum caused by a force over time. Together they describe how objects change motion.

公式

The calculator finds momentum (p = m × v) and impulse (J = F × Δt = Δp)

J: F × Δt = Δp) — F × Δt = Δp)
F: Δp) — Δp)
p: m × v) and impulse (J = F × Δt = Δp) — m × v) and impulse (J = F × Δt = Δp)

ステップバイステップガイド

1Enter initial velocity, final velocity, mass, or force and time duration
2The calculator finds momentum (p = m × v) and impulse (J = F × Δt = Δp)
3Results show both values and verify the impulse-momentum relationship

解いた例

入力

m = 2 kg, v₀ = 5 m/s, v_f = 15 m/s

結果

Δp = 20 kg·m/s

Or F × t = 20 N·s for any force duration

避けるべきよくある間違い

✕Confusing momentum direction with speed magnitude
✕Applying conservation incorrectly in systems with friction or air resistance

よくある質問

Why is impulse important in collisions?

Extending the collision time (increasing Δt) reduces the force needed, which is why airbags save lives.

Is momentum conserved?

Yes, in isolated systems with no external forces. This is why collisions between objects follow predictable patterns.

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