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what is the youngs modulus for a perfect rigid body?
To describe elastic properties of linear objects like wires, rods, or columns which are stretched or compressed, a convenient parameter is the ratio of the stress to the strain, a parameter called the "Young's modulus" or "Modulus of Elasticity" of the material.


Young modulus=stress/strain
Since the body is perfectly rigid, there is nochange in length.
ie, strain=0

Y.M.=stress/0 = INFINITY .


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