8.18 and 8.19 For the cross-sectional areas shown, 4 calculate the moment of inertia with respect to the horizontal X-X centroidal axis.

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A: For solution refer below images.

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Moment of Inertia

Inertia can be termed as a resistance offered by a body to change its state. A rigid body initially at rest will apply resistance when acted by an external force that tends to change its state of rest or velocity, or a body initially at motion will provide resistance in changing its state of velocity or motion for coming to a state of rest. In other words, Newton's first law of motion describes the law of inertia of a rigid body.