Enter any two of force, mass, and acceleration (use consistent units), then click calculate to get the missing value.
Newton's second law states that acceleration is proportional to the net force and inversely proportional to mass.
With F for net force, m for mass, and a for acceleration, the law is written as F = m · a. This tool uses that relationship for mutual calculation.
If mass and acceleration are known, compute force; if force and mass are known, compute acceleration; if force and acceleration are known, compute mass.
Use consistent units such as N, kg, and m/s². Mixed units can lead to incorrect magnitudes.
Net force is the vector sum of all forces. When friction or other forces exist, resolve the net force first.
All inputs should be greater than zero. If the result seems off, recheck signs, units, and whether you used net force.
F = m · a, where F is net force, m is mass, and a is acceleration.
The newton (N), where 1 N = 1 kg·m/s².
Acceleration points in the same direction as the net force.
Acceleration is zero; the object stays at rest or moves at constant velocity.
Acceleration decreases.
Motion is determined by the vector sum of all forces, not just one of them.
Compute net force by subtracting friction (and other opposing forces) first.
Mass should be positive; zero or negative values are not physical.
It can be a first approximation, but variable mass systems need a more complete treatment.
The formula is dimensionally strict; mixed units produce incorrect results.
Quickly convert between force, mass, and acceleration for study, engineering estimates, and lab checks.
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