Jak vypočítat Momentum
Co je Momentum?
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.
Vzorec
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)
Průvodce krok za krokem
- 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
Worked Examples
Vstup
m = 2 kg, v₀ = 5 m/s, v_f = 15 m/s
Výsledek
Δp = 20 kg·m/s
Or F × t = 20 N·s for any force duration
Common Mistakes to Avoid
- ✕Confusing momentum direction with speed magnitude
- ✕Applying conservation incorrectly in systems with friction or air resistance
Frequently Asked Questions
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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