Question 3: An unknown amount of vertical shear force (not shown in the figure) is applied to the following cross-section. Transverse stress value is desired at distance 'y' away from the horizontal neutral axis, as shown in the figure below. In the process of calculating the first moment of area, Q, two different approaches are adopted: 1) Area A' is considered above the point of interest, and 2) Area A' is considered below the point of interest. Which of the following statements is correct? Area= A' (NA) (NA) Area= A' %3D %3D

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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.