🍎 Newton's Second Law Calculator (F = ma)
Apply F = ma: enter any two of force, mass and acceleration and get the third.
Force F
98 N
Newton’s second law: F = m·a (force = mass × acceleration). For weight, use a = g. 🔒 Computed in your browser.
How the newton's second law calculator (f = ma) works
Newton’s second law states that the net force on an object equals its mass times its acceleration: F = ma. Enter any two of the three and the tool solves for the remaining one. For weight, set a to g (9.8 m/s²).
The foundation of dynamics. Force in newtons, mass in kilograms, acceleration in m/s². To find weight, use F = mg with g ≈ 9.8 m/s².
Frequently asked questions
What is Newton’s second law?
The net force on an object equals mass times acceleration: F = ma. A larger force gives more acceleration; a larger mass gives less for the same force.
How do I find acceleration from force and mass?
Rearrange to a = F/m. A 50 N force on a 10 kg object gives 5 m/s². Enter force and mass to get acceleration.
How do I calculate weight?
Weight is the gravitational force: W = mg, with g ≈ 9.8 m/s². A 10 kg mass weighs about 98 N. Use a = g in this tool.
What units does F = ma use?
Force in newtons (N), mass in kilograms (kg), acceleration in metres per second squared (m/s²). 1 N = 1 kg·m/s².
Is F the net force?
Yes — F is the resultant (net) of all forces acting. If forces oppose, subtract them first to get the net force before applying F = ma.