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A body is said to be "free" when it is singled out from other bodies for the purposes of dynamic or static analysis. The object does not have to be "free" in the sense of being unforced, and it may or may not be in a state of equilibrium; rather, it is not fixed in place and is thus "free" to move in response to forces and torques it may experience.
direction: unitless impact parameter meter (m) differential (e.g. ) varied depending on context differential vector element of surface area A, with infinitesimally small magnitude and direction normal to surface S: square meter (m 2) differential element of volume V enclosed by surface S
The concept of force makes the everyday notion of pushing or pulling mathematically precise. Because the magnitude and direction of a force are both important, force is a vector quantity. The SI unit of force is the newton (N), and force is often represented by the symbol F. Force plays an important role in classical mechanics.
A force is either a push or a pull, and it tends to move a body in the direction of its action. The action of a force is characterized by its magnitude, by the direction of its action, and by its point of application (or point of contact). Thus, force is a vector quantity, because its effect depends on the direction as well as on the magnitude ...
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ISO 31-3 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to mechanics. It was published on 27 August 1992 and withdrawn on 17 March 2006 due to being superseded by ISO 80000-4. [1] Its definitions include (note boldfaced symbols mean quantity is a vector):
Maximum force of a molecular motor [8] 10 −11 10 −10 ~160 pN Force to break a typical noncovalent bond [8] 10 −9 nanonewton (nN) ~1.6 nN Force to break a typical covalent bond [8] 10 −8 ~82nN Force on an electron in a hydrogen atom [1] 10 −7 ~200nN Force between two 1 meter long conductors, 1 meter apart by an outdated definition of ...
The bending force is computed by the vector cross-product. This means that the bending force increases with the velocity of the particle and the strength of the magnetic field. The force is maximum when the particle direction and magnetic fields are perpendicular, is less at any other angle, and is zero when the particle moves parallel to the ...