Final answer:
The shear modulus is a measure of the stiffness of a material when subjected to shear stress. It represents the ratio of shear stress to shear strain.
Step-by-step explanation:
The shear modulus is a measure of the stiffness of a material when subjected to shear stress. It represents the ratio of shear stress to shear strain. To solve this, we can set up an equation to represent each person's charging structure and then equate them.
For a circular composite, the shear modulus can be calculated using the equation:
Shear modulus = (Shear stress) / (Shear strain)
In this case, the shear modulus for the circular composite is given as 1 x 10⁹ N/m².