The (symbol: '''N''') is the SI Derived Unit of Force , named after Sir Isaac Newton in recognition of his work on Classical Mechanics .
A ''newton'' is the amount of force required to Accelerate a body with a Mass of one Kilogram at a rate of one Meter Per Second Squared . Algebraically:
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- 1 N is the force of Earth's gravity on an apple with a mass of about 102 g ( kg).
- On Earth's surface, a mass of 1 kg exerts a force of approximately 9.8 N on its support. The approximation of 1 kg corresponding to 10 N is sometimes used as a rule of thumb in everyday life and in engineering (except where strict accuracy is required).
- The force of Earth's gravity on a human being with a mass of 70 kg is approximately 686 N.
- The Scalar Product of force and distance (N×m)— a force of 1 N carried out over a distance of 1 m— is one Joule , the basic unit of Energy in the SI.
- Pascal a unit of Pressure defined by one newton acting over a square meter
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