Question

Bending moment diagram for a over hanged beam is shown in figure. [Consider the supports at B and D]
The magnitude of maximum shear force is _____kN.

• A. 4

Answer 1

The correct option is A 4

R${}_D$ = $\frac{10}{8}$= 1.25 kN $\downarrow$

For span AB, UDL (w) is acting on AB
$\therefore \frac{w(4{)}^2}{2}=8$
$w=1.0kN/m$
$\sum F_y=0$
$\Rightarrow R_D+R_B=w\left(l_{AB}\right)$
$R_B=4-(-1.25)$
$R_B=5.25kN\uparrow$
Shear force diagram