what is meant by a rigid body

Asked by rathi nisha | 18th Nov, 2010, 08:08: PM

Expert Answer:

suppose a body consist of n particle and each particle is denoted by subscript 1,2,3,4 etc. Then position vectors of each particle (from a refrence point) are :
And if
where Cij is constant (ditance between ith and jth particle) independent  of time or other variable.
Such a body is called rigid body. (or rigid sysytem)
 
In physics, a rigid body is an idealization of a solid body of finite size in which deformation is neglected. In other words, the distance between any two given points of a rigid body remains constant in time regardless of external forces exerted on it. Even though such an object cannot physically exist due to relativity, objects can normally be assumed to be perfectly rigid if they are not moving near the speed of light.

Answered by  | 18th Nov, 2010, 08:18: PM

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