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Theory of Structures - Engineering

Q1:

The deflection of a uniform circular bar of diameter d and length l, which extends by an amount e under a tensile pull W, when it carries the same load at its mid-span, is

A

B

C

D

ANS:C -

Now $ = WL^3/3AE*d^2 or eL^2/3d^2. Where is One L.
When you solve you get el^3/3d^2.