# Newton (unit)

The newton (symbol: N) is the SI unit of force. It is named after Sir Isaac Newton because of his work on classical mechanics. A newton is how much force is required to make a mass of one kilogram accelerate at a rate of one metre per second squared.

${\displaystyle 1\,\mathrm {N} =1\,\mathrm {kg} \cdot \mathrm {m} /\mathrm {s} ^{2}}$
• 1 N is the force of Earth's gravity on an apple with a mass of about 102 g.
• On the Earth's surface, a mass of 1 kg pushes on its support with an average force of 9.8 N.