The unit of force in the metric (SI) system is the newton , symbol N.

  • One newton is defined as the force needed to accelerate a mass of one kilogram at one meter per second squared: 1textN=1textkg⋅m/s21\\text{N}=1\\text{kg·m/s}^21textN=1textkg⋅m/s2.
  • The newton is named after Sir Isaac Newton, reflecting his role in formulating the laws of motion.