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In geometry and mechanics, a displacement is a vector whose length is the shortest distance from the initial to the final position of a point P undergoing motion. [1] It quantifies both the distance and direction of the net or total motion along a straight line from the initial position to the final position of the point trajectory.
In mechanics, a displacement field is the assignment of displacement vectors for all points in a region or body that are displaced from one state to another. [1] [2] A displacement vector specifies the position of a point or a particle in reference to an origin or to a previous position.
The force and torque vectors that arise in applying Newton's laws to a rigid body can be assembled into a screw called a wrench. A force has a point of application and a line of action, therefore it defines the Plücker coordinates of a line in space and has zero pitch. A torque, on the other hand, is a pure moment that is not bound to a line ...
Displacement field (mechanics), an assignment of displacement vectors for all points in a body that is displaced from one state to another; Electric displacement field, as appears in Maxwell's equations; Wien's displacement law, a relation concerning the spectral distribution of blackbody radiation
The displacement D of the center of mass can be decomposed into components parallel and perpendicular to the axis. The perpendicular (and parallel) component acts on all points of the rigid body but Mozzi shows that for some points the previous rotation acted exactly with an opposite displacement, so those points are translated parallel to the ...
Strain can be formulated as the spatial derivative of displacement: = ′, where I is the identity tensor. The displacement of a body may be expressed in the form x = F ( X ) , where X is the reference position of material points of the body; displacement has units of length and does not distinguish between rigid body motions (translations and ...
The linear motion can be of two types: uniform linear motion, with constant velocity (zero acceleration); and non-uniform linear motion, with variable velocity (non-zero acceleration). The motion of a particle (a point-like object) along a line can be described by its position , which varies with (time).
Chasles' theorem shows that each Euclidean displacement in three-dimensional space has a screw axis, and the displacement can be decomposed into a rotation about and a slide along this screw axis. [1] [2] Plücker coordinates are used to locate a screw axis in space, and consist of a pair of three-dimensional vectors. The first vector ...