C

Solution

The product second moment of area of the section is given by eqn. (1.3). lxy = HAhk

+ 114 x 13[—(83 - I x 114)][—(19 -|x 13)]}10"12

^ E.J. Hearn, Mechanics of Materials I, Butterworth-Heinemann, 1997.

Mechanics of Materials 2 = (0.704 + 0.482)10~6 = 1.186 x 10~6 m4

From eqn. (1.20) Mx = PIxy + QIXX = 10000 x 1.2 = 12000

Since the load is vertical there will be no moment about the Y axis and eqn. (1.21) gives

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