Structural Analysis
For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust

Becomes zero
Remains unchanged
Is increased
Is decreased

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Structural Analysis
To generate the j th column of the flexibility matrix

a unit displacement is applied at co-ordinate j and the forces are calculated at all coordinates
a unit force is applied at coordinate j and the forces are calculated at all coordinates
a unit displacement is applied at co-ordinate j and the displacements are calculated at all co-ordinates
a unit force is applied at coordinate j and the displacements are calculated at all coordinates

ANSWER DOWNLOAD EXAMIANS APP