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单词 field of force
释义

field of force


field of force

n. pl. fields of force A region of space throughout which the force produced by an agent or several agents, such as an electric charge, is operative. Also called force field.

field of force

n (General Physics) the region of space surrounding a body, such as a charged particle or a magnet, within which it can exert a force on another similar body not in contact with it. See also electric field, magnetic field, gravitational field
Thesaurus
Noun1.field of force - the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with itfield of force - the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with itforce field, fieldphysical phenomenon - a natural phenomenon involving the physical properties of matter and energyelectric field - a field of force surrounding a charged particlegravitational field - a field of force surrounding a body of finite massmagnetic field, magnetic flux, flux - the lines of force surrounding a permanent magnet or a moving charged particleradiation field - a field that represents the energy lost from the radiator to space

Field of Force


Field of Force

 

a bounded or unbounded region of space at every point of which a force of a certain magnitude and direction acts on a material particle placed at the point. The force depends only on the coordinates x, y, z of the point or on the coordinates x, y, z and the time t. In the first case the field is said to be stationary, and in the second case nonstationary. If the force has the same value at all points of the field—that is, is independent of the coordinates and time—then the field is said to be uniform.

A field of force is said to be a potential field if the work done by the forces of the field on a material particle moving in the field depends only on the initial and final positions of the particle and is independent of the particle’s trajectory. This work can be expressed in terms of the potential energy of the particle Π (x, y, z) by the equation A = Π(x1, y1z1) – Π(x2, y2, z2), where x1, y1, z1, and x2, y2, z2 are the coordinates of the initial and final positions of the particle, respectively. When the particle moves in a potential field under the action of only the field forces, the law of conservation of mechanical energy holds; this law permits establishment of the relation between the particle’s velocity and position in the field of force.

An example of a potential field is the uniform field of the force of gravity, for which Π = mgz, where m is the mass of the particle and g is the acceleration of the force of gravity (the z-axis is directed vertically upward). A Newtonian gravitational field is also an example of a potential field. Here, Π = – fm/r, where r is the distance of the particle from the center of attraction and f is a constant for the given field.

S. M. TARG

field of force


  • noun

Synonyms for field of force

noun the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it

Synonyms

  • force field
  • field

Related Words

  • physical phenomenon
  • electric field
  • gravitational field
  • magnetic field
  • magnetic flux
  • flux
  • radiation field
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更新时间:2025/1/10 16:26:58