Discussion
Assertion (A): Wing ribs are more closely spaced towards the root.
Reason (R): Bending moment and skin compressive stress are highest near the root.
Select the correct answer from the options below.
Answer: A
Both statements are true and the second is the reason for the first. A higher compressive stress demands a shorter panel to avoid buckling, so the rib pitch follows the stress distribution rather than the geometry of the aerofoil.
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