Momentum Calculator
Enter mass and velocity to compute linear momentum p = m·v.
Input Data
Results
At a glance:Linear momentum p is the product of an object's mass and velocity: p = m·v. It is a vector pointing in the direction of motion, with magnitude (kg·m/s). Momentum is conserved in a closed system (no net external force), the principle behind collisions, explosions and recoil. Impulse J = Δp = F·Δt changes momentum. In relativity the definition generalises to p = γmv.
Formula
Momentum: p = m·v
Impulse: J = Δp = F·Δt
$$p = m\,v$$How to Use
- Enter the mass m (kg).
- Enter the velocity v (m/s).
- The calculator returns the momentum p.
Case Studies
Moving car
m = 1000 kg, v = 20 m/s.
p = 1000×20 = 20000 kg·m/s.
Same momentum as a 2000 kg truck at 10 m/s.
FAQ
What does conservation of momentum mean?
In an isolated system the total momentum before an event equals the total after it (Σp_initial = Σp_final). This lets you solve collisions and explosions without knowing the internal forces.
Is momentum a vector?
Yes. Direction matters: opposite velocities give opposite momenta, which is why things can recoil in the opposite direction.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.