Modulus of rigidity is defined as the
ratio of normal stress to tangential strain
ratio of tangential stress to sheer strain
ratio of normal stress to sheer strain
ratio of tangential stress to tangential strain
Modulus of rigidity is defined as the ratio of tangential stress to sheer strain.
in case of tangential stress,the strain is given by the relative displacement between the top and the bottom phase .in that case the strain must be equal to costheta right