Newton (unit)

The newton (symbol: N) is the standard SI unit of force. One newton is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared—a quantification that emerges directly from Newton's second law of motion.

Named after the English mathematician and physicist Isaac Newton in 1948, the unit became essential for understanding everything from the tides governed by gravitational pull to the engineering forces that hold buildings upright. In everyday terms, one newton approximates the force of Earth's gravity on a 100-gram apple.

The newton enables precise measurement of forces across disciplines: engineers use it to calculate stress on materials, physicists apply it to particle interactions, and biologists employ it to understand muscular contractions in living things. Because force is fundamental to understanding motion, Energy, and mass distribution, the newton remains one of science's most universally applied units.

Derived units like the pascal (newtons per square meter) and the joule (newtons times meters) extend its reach throughout physics and engineering.

Related

Isaac Newton, Force, Laws of Motion, SI Units, Gravity, Pascal (unit), Joule (unit)