What is the definition of a rigid body according to Wolfram Scienceworld?

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SUMMARY

A rigid body is defined by Wolfram Scienceworld as a body R, irrespective of its shape and volume, that maintains constant relative distances between any two points within it, even when subjected to external forces. This definition emphasizes the fundamental property of rigidity in physics, which is crucial for understanding rigid body motion. The concept is essential for various applications in mechanics and engineering.

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Sitakalyani
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I would like to a complete details on rigid body motion.
 
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Wolfram Scienceworld gives a very neat definition of a rigid body:

"A body R, regardless of shape and volume, with the characteristic that the relative distance between any two points of R remains constant, even if the body is acted upon by external forces."
 

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