Overview of units derived from the seven basic units of the International System of Units. All three units are named for eminent scientists. The CGPM added three new units (among others) in 1948: a unit of force (the newton), defined as that force which gives to a mass of one kilogram an acceleration of one metre per second per second a unit of energy (the joule), defined as the work done when the point of application of a newton is displaced one metre in the direction of the force and a unit of power (the watt), which is the power that in one second gives rise to energy of one joule. The early international system devised to rectify this situation was called the metre-kilogram-second (MKS) system. Rapid advances in science and technology in the 19th and 20th centuries fostered the development of several overlapping systems of units of measurements as scientists improvised to meet the practical needs of their disciplines. Adopted by the 11th General Conference on Weights and Measures (CGPM) in 1960, it is abbreviated SI in all languages. International System of Units (SI), French Système International d’Unités, international decimal system of weights and measures derived from and extending the metric system of units. Overview of the International System of Units.
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The unit of torque or moment of force is the newton-meter ( N-m), where m is the moment arm. The newton combined with other measurements is used in various applications. This unit of measurement is in the metric or SI system and is used in scientific work more than other units of force.ġ N is equivalent to 1 kg-m/s 2. A newton is the force required to give a mass of 1 kilogram ( 1 kg) an acceleration of 1 meter per second per second ( 1 m/s 2).
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