The newton (symbol: N)'s the SI derived unit of force, named after Isaac Newton in recognition of his work on classical mechanics. Definition The newton's the unit of force derived in the SI system; it's equal to the amount of force required to accelerate a mass of one kilogram at a rate of one metre per second per second. Algebraically: . Examples 1 N's the force of Earth's gravity on an object with a mass of about 102 g ( kg) (such as a small apple). On Earth's surface, a mass of 1 kg exert… (More on Kilonewton)