Question

The bending moments at point A, B and C of the beam shown in the given figure will be

• A. 10 kN - m, 10 kN-m and 10kN-m
• B. 10 kN-m, 10kN-m and -10kN-m
• C. 20 kN-m, 10kN-m and -10kN-m
• D. 10 kN-m, -10kN-m and 20kN-m

Answer 1

The correct option is B 10 kN-m, 10kN-m and -10kN-m

(b)
Let R is vertical reaction and taking moment about hinge = 0

$\Rightarrow R\times 7.5-4\times 5-4\times 2.5=0$

$\therefore$ BM at A= 4 $\times$ 2.5 = 10 kN-m
BM at B= 10 + 0 = 10 kN-m
BM at C = 10 - 4 $\times$5 = - 10 kN-m