rigid body

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Rigid body

An idealized extended solid whose size and shape are definitely fixed and remain unaltered when forces are applied. Treatment of the motion of a rigid body in terms of Newton's laws of motion leads to an understanding of certain important aspects of the translational and rotational motion of real bodies without the necessity of considering the complications involved when changes in size and shape occur. Many of the principles used to treat the motion of rigid bodies apply in good approximation to the motion of real elastic solids. See Rigid-body dynamics

rigid body

[′rij·id ′bäd·ē]
(mechanics)
An idealized extended solid whose size and shape are definitely fixed and remain unaltered when forces are applied.
References in periodicals archive ?
In an experiment on a mixture of water, surfactant (soap) and an organic salt, two researchers from the Pritchard Fluid Mechanics Laboratory at Penn State show that a rigid object like a knife passes through the mixture at slow speeds as if it were a liquid, but rips it up as if it were a rubbery solid when the knife moves rapidly.
They cover physics and measurement, motion and its laws, vectors, circular motion and other notions from Newton, the energy of a system conservation of energy, linear momentum and collisions, rotation of a rigid object about a fixed axis, angular momentum, static equilibrium and elasticity, universal gravitation, fluid mechanics, oscillatory motion, wave motion, sound waves, superposition and standing waves, temperature, the first and second laws of thermodynamics, the kinetic theory of gases, heat engines, and entropy.
In this protocol, the reference frame is shifted and the MMB brings a rigid object into a stationary vehicle.
While existing frame-by-frame techniques can produce relatively realistic movement of rigid objects, they remain unable to recreate the elegant and fluid movements of a non-rigid object, such as a Sumo wrestler falling to the floor, a sea lion playing on a beach, or a bowl of Jello salad being set on a picnic table.
It can detect and recognize whether a particular rigid object, such as a product, logo or building, is in a scene and identify its specific location in that scene.
Rigid objects with sharp edges like dropped tools; heavy equipment; winds which blow branches and debris onto roofs; and frequent foot traffic for general maintenance and repair can cause punctures at any time, explained Todd Kuykendall, director of Marketing and Product Management, Georgia-Pacific Gypsum.
They are more appropriate for representing simple rigid objects.
2011, Tracking rigid objects using integration of model-based and model-free cues.
rigid objects, articulated bodies, meshes with fixed topology), utilizing the computational power of GPUs [1, 22-24], and introducing efficient culling methods [14].
The robot will start out with one arm picking up and using rigid objects "just to get the teams' feet wet" and then graduate to two arms and more difficult to manipulate objects such as cloth, he said.
The real size of rigid objects and of the artificial fish was unknown to the observers throughout the measurement experiment.
The tracked objects in the examples are almost rigid objects.