題組內容

(20%) 5. An arm ABC lying in a horizontal plane and supported at A is made of two identical solid steel bars AB and BC welded together at a right angle. Each bar is 0.6 m long.
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(b) If the allowable tensile stress is 10 MPa and each bar has diameter d = 50 mm, what is the maximum downward load P that can be applied at C (in addition to self-weight)? (10%)