MihsabaHow to use
Linear momentum in one dimension equals mass times velocity. Because velocity is directional, the calculator preserves sign to represent the chosen direction.
- Choose momentum p, mass m or velocity v as the unknown.
- Enter known values and units; velocity or momentum may be negative for the opposite direction.
- Calculate the result and SI equivalent.
How it is calculated
p=mv; m=p÷v; v=p÷m
Example
Example: a 0.15 kg object at -30 m/s has momentum -4.5 kg·m/s relative to the chosen sign axis.
Important notes
The calculator handles one signed linear component only; it is not a 2D/3D vector or multi-body collision solver.
Frequently asked questions
Is N·s equal to kg·m/s?
Yes. They are dimensionally and numerically equivalent in SI.
Why can momentum be negative?
The sign represents direction along your chosen axis; mass itself remains positive.
Is this calculator free?
Yes. It is free to use and requires no account.