mechanics
Newton's Second Law Calculator
Solve force, mass, or acceleration with unit-aware steps.
Calculator
Formula
F = m a
- F — Force
- N
- m — Mass
- kg · g · mg
- a — Acceleration
- m/s²
Assumptions and limits
- Mass is constant in an inertial reference frame.
Example
A 2 kg object accelerating at 3 m/s²
Choose “Load example” in the calculator to restore these inputs and see the complete steps.
Sources
Frequently asked questions
Are my inputs uploaded?
No. This calculator runs locally in your browser. Inputs are placed in a URL only when you explicitly copy a share link.
Why are units converted first?
Canonical units prevent scale errors when inputs use mixed units. The result is converted back to your selected output unit afterward.
Does the result replace professional judgment?
No. The result applies only to the stated model and assumptions. Qualified people should review high-risk engineering, medical, or laboratory decisions.