If the qualification of a material as a linear n = 1 In the lower have of the inertia moment value corresponds to the area of ผืย fabric, therefore the equation (2.10).
If the properties of the material is a linear n = 1 will be reduced to match the In the moment of inertia of a rectangular cloth Expansive equation (2.10).
Considering the properties of material is linear n = 1 will make the In reduced to match the moment of inertia of a rectangular area ผืย fabric as equation (2.10).