Newton (force)
In physics, a compound SI unit, the newton (symbol: N) is the unit of force, named for Sir Isaac Newton in recognition of his work on classical mechanics.
It is defined as the amount of force required to accelerate a one kilogram mass at a rate of one meter per second per second.
It is also the unit of weight, as weight is the force acting between two objects due to gravity.
A mass of one kilogram, at the surface of the earth, has a weight of about 9.8 newton. Rather fittingly, a newton is the weight of a 102 gram apple.
See also: Newton (disambiguation), Dyne, CGS