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Force, mass & acceleration (F = ma)

Newton’s second law: find the force, the mass or the acceleration from the other two.

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Force 4,500 N

How it works

F = m × a

A net force on a mass makes it accelerate: one newton speeds up one kilogram by one meter per second every second. Double the force and the acceleration doubles; double the mass and it halves. Weight is the same law with a = g: a 70 kg person weighs 70 × 9.81 ≈ 687 N.

  1. F = m × a 1,500 kg × 3 m/s² = 4,500 N

Printed from rocketcalc.io/physics/newtons-second-law