Total load is 5 kN, acting at 2L/3 from A. Reactions are R(A)=5/3 and R(B)=10/3 kN. At x from A, shear is 5/3−1.25x²; zero shear gives x=√(4/3) m. Moment is(5/3)x−(5/12)x³, giving 1.2830 kN·m, or 1.28.
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