Question

Internal indeterminacy of given pin jointed frame is ______

• A. 2

Answer 1

The correct option is A 2

$Here,m=39;J=20;r=6$
$Totalindeterminacy{D}_S=m+r-2J$
$=39+6-2\times 20$
$=45-40$
$=5$
$\text{External indeterminacy}=r-3=6-3=3$
$\text{Internal indeterminacy = Total - External}$
$=5-3$
$=2$