How it works
Linear momentum p = mass × velocity, in kg·m/s.
Input definitions
- Mass (kg)
- Enter the value in the labeled unit.
- Signed velocity (m/s)
- Enter the value in the labeled unit.
A worked example
- Mass (kg)
- 2
- Signed velocity (m/s)
- 3
Assumptions & limits
One-dimensional, nonrelativistic motion. The velocity sign determines momentum direction.
Sources & review
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Method updated 2026-10-17. Content checked against the stated method and examples. Our verification approach.
Common questions
Why can momentum have a negative result?
The velocity sign describes direction along one axis. Negative momentum indicates motion in the negative direction; it does not indicate negative mass.
Which units should I enter?
Use the units written in each input label. These formulas assume idealized conditions; changing to centimetres, litres or kilopascals without conversion changes the meaning of the result.
How does the Linear momentum tool work?
Linear momentum p = mass × velocity, in kg·m/s.
What are the assumptions and limits of Linear momentum?
One-dimensional, nonrelativistic motion. The velocity sign determines momentum direction.