Newton's Second Law Calculator
Calculate force from mass and acceleration using F = ma.
Assumptions used in this calculation
- Constant mass: Assumes constant mass (not a rocket losing fuel mass, for example), the classic F=ma form of Newton's Second Law.
About this calculator
Newton's Second Law, F = ma, is the foundation of classical mechanics, but applying it correctly means being careful that the force you calculate is the net force, the sum of every force acting on the object, not just one force in isolation, a distinction that's easy to lose sight of when a problem lists several forces acting in different directions. This calculator computes the net force required to produce a given acceleration for an object of a known mass, taking mass in kilograms and acceleration in metres per second squared to return force in newtons. It's built for physics coursework and quick engineering checks, whether verifying how much force a motor or engine needs to accelerate a given mass at a target rate, or working backward from a known force to find resulting acceleration, saving the step of rearranging F = ma for whichever variable is unknown in a specific problem.
Worked example
10kg mass accelerating at 9.8 m/s² (gravity)
Result: 98 N
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