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The newton (symbol: N) is the International System of Units (SI) unit of force. It is named after Isaac Newton

Note: Units named after people use capital letters for the letter symbol - but not for the unit name itself.

  • A newton is defined as the force needed to accelerate one kilogram of mass at the rate of one metre per second squared - i.e. kg x m x s−2
  • A newton applied at the end of a metre long lever will exert a turning force, Torque or Moment of Force of a newton metre (N x m) - this is the same as the derivation of a joule, (symbol: J), named after James Prescott Joule and used to measure energy, work, heat - but joules are not used for Torque.
  • A newton applied over a square metre (i.e. N/m2) is used to measure Stress, Young's Modulus, U.T.S. or pressure and derives the S.I. Unit of pascal (symbol: Pa), named after Blaise Pascal.