Momentum Calculator
Use kilograms, metres per second, newtons and seconds. Signed velocities and force indicate direction.
A QUICK WALKTHROUGH
How to use this tool
- Choose momentum, an impulse method, or a collision model.
- Enter the values in SI units.
- Calculate and compare momentum and kinetic energy.
Formulas and assumptions
Momentum p = mv; impulse J = FΔt = m(vf − vi). Collision calculations conserve momentum in an isolated one-dimensional system. Elastic collisions conserve kinetic energy; perfectly inelastic objects share a final velocity.
GOOD TO KNOW
Common questions
Can velocities be negative?
Yes. Choose one positive direction and use negative values for the opposite direction.
What happens when initial kinetic energy is zero?
Energy-loss percentage is undefined and shown as not applicable; energy values remain available.