The Principal Axes of a Cross-Section are Defined as

Answer: B. The axes about which product of inertia is zero.

The principal axes of a cross-section are defined as the axis about which product of inertia is zero.

Solution

Principal axis is the axis passing through the centroid of the body about which the product of inertia is zero.

In case of symmetrical bodies, the principal axis divides the area into two equal parts.

Both principal axes for a rigid body intersect each other and pass through the centroid of the body.

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