Newton (unit)

The Newton [ nju ː tn ] ( unit symbol N ) is the unit in the International System of Units (SI) used for the physical quantity force. It was established in 1946 by the General Conference on Weights and Measures in the modern sense and named in 1948 by her after the English scientist Isaac Newton.

Newton is a unit derived, they can by means of the so-called base, kilogram (kg), meters (m) and seconds ( s ) be expressed as:

Viewpoints

A Newton is the amount of force required to accelerate a body at rest of mass 1 kg within one second uniformly to the speed.

Or:

A Newton is the amount of force required to impart a body of mass 1 kg, the acceleration.

Or:

A Newton is the size of the force required, the speed of a body of the mass 1 kg per second to change in a linear motion.

If you want to specify the weight of an object in a gravitational field ( which is usually done in Newtons) is to distinguish from the mass of the object, which is expressed in kg. As a rule of thumb: 1 kg corresponds to the earth's surface about 10 N, but the units are different. Since the average acceleration due to gravity (or local factor) at sea level, experiences a body of mass 1 kg where the weight of 9.81 N. Conversely, 1 Newton weight force 102 grams acts on a body to the ground.

Maximum loads of floors are often expressed in Newton or Newton per square meter. The tensile strength of ropes (eg tow-rope) or the load limit of cranes is often expressed in Newton - or she was using the above rule of thumb in a permissible mass converted: One divides the given number by 10 in Newton

Common Multiples

The unit symbol can be combined with the usual attachments for units of measurement. Commonly used are:

  • MN, meganewtons ( 1,000,000 newtons) is a unit that is used in large solid rocket thrust forces (such as the space shuttle ).
  • KN, kN (1,000 Newtons) is the usual unit in the building industry for forces ( 1 kN corresponds approximately to the weight force acting on a mass of 100 kg), also the thrust of jet and rocket engines for aircraft and large missiles as well as traction or brake power for locomotives and railroad locomotives.
  • DaN, decanewtons ( 10 Newtons ) is a unit that is used for example in lifting technology as well as in securing loads to indicate the viability or the breaking strength of ropes or straps (DIN 61360 Safe use of lifting accessories ) and approximately equal to the weight force, acting on a mass of 1 kg.
  • CN centiNewtons or centiNewtons ( 0.01 Newton ) is a customary unit for describing the strength of fibers and yarns (e.g., cN / dtex).
  • MN, millinewtons (0,001 Newtons) is the common unit of thrust ion engines.
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