Newton (N)

Quantity: Force · Category: Derived SI

The newton is the SI unit of force: the force needed to accelerate a one-kilogram mass at one meter per second squared. It is named after Isaac Newton, whose second law F = ma defines it.

Relation to SI

1 N = 1 kg·m/s²

Examples

• An apple weighs about 1 newton in your hand.
• A professional boxer's punch peaks near 5,000 newtons.