Science · free · no sign-up
Momentum calculator
Momentum is mass in motion. Enter any two of momentum, mass and velocity to find the third.
Momentum Calculator
p = m × v · Mass · Velocity
p = m × v | Momentum in kg·m/s
About the Momentum calculator
Momentum is mass in motion. Enter any two of momentum, mass and velocity to find the third.
How to use the Momentum calculator
- Choose what to solve for under Solve For: p, m or v.
- Enter the Mass (kg) and Velocity (m/s) (or momentum).
- Press Calculate.
Formula and method
p = m × v, measured in kg·m/s. In a closed system total momentum is conserved.
Worked example
A 1,000 kg car travelling at 20 m/s has 20,000 kg·m/s of momentum.
Tips
- Momentum has direction, so opposite directions have opposite signs.
- Impulse (force × time) equals the change in momentum.
Frequently asked questions
What is conservation of momentum?
In a collision with no outside forces, the total momentum before equals the total momentum after.