Information about Body Moment
In mechanics, a moment is a measure of the turning effect of a force about some point in space. In most practical examples, moments are the results of forces acting at a distance from the point of interest. The stress on the body on which the force acts is then symmetric. If the moment results from a strong body force, such as that produced in a magnetic material in a strong magnetic field, the stress tensor is non-symmetric.
Mechanics (Greek Μηχανική
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References
- Fung, Y.C, Foundations of Solid Mechanics, Prentice-Hall (1965)
For other uses, see Mechanic (disambiguation).
Mechanics (Greek Μηχανική
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Moment may refer to:
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- Moment (time)
- Moment (physics)
- Moment (mathematics), used in probability theory and statistics
- Moment (magazine), an American Jewish publication
- Moment (album), an album by SPEED
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In physics, force is an action or agency that causes a body of mass m to accelerate. It may be experienced as a lift, a push, or a pull. The acceleration of the body is proportional to the vector sum of all forces acting on it (known as net force or resultant force).
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Stress is a measure of force per unit area within a body. It is a body's internal distribution of force per area that reacts to external applied loads. Stress is often broken down into its shear and normal components as these have unique physical significance.
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In mathematics, a symmetric tensor is a tensor that is invariant under a permutation of its vector arguments. Symmetric tensors of rank two are just symmetric matrices, and so are sometimes called quadratic forms.
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A body force is a force that acts on the volume of a body. The units on a body force are force per volume; compare this to pressure (a surface force), which has units of force per area.
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magnetism is one of the phenomena by which materials exert attractive or repulsive forces on other materials. Some well known materials that exhibit easily detectable magnetic properties (called magnets) are nickel, iron and their alloys; however, all materials are influenced to
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magnetic field is a field that permeates space and which exerts a magnetic force on moving electric charges and magnetic dipoles. Magnetic fields surround electric currents, magnetic dipoles, and changing electric fields.
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The term tensor has slightly different meanings in mathematics and physics. In the mathematical fields of multilinear algebra and differential geometry, a tensor is a multilinear function.
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