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For a simply supported beam of length L with central point load P, maximum bending moment is: 
APL
BPL/2
CPL/4 at midspan
DPL/8
Answer & Solution
Correct answer: C. PL/4 at midspan
SSB with central P: reactions = P/2 each. SF: ±P/2 either side of load. BM: triangular, max at midspan = (P/2)(L/2) = PL/4. Maximum deflection: PL³/(48EI) at midspan.
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