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Theory of Structures - Engineering

Q1:

The force in BF of the truss shown in given figure, is

A 4t tension

B 4t compression

C 4.5t tension

D 4.5t compression

E zero.

ANS:D - 4.5t compression

By equilibrium conditions.

All vertical forces=0,
Va + Vb = 5t, ----> eqn(1).

Taking moments about A,
Vb*2=5*1+4*1,
Vb = 4.5t
Va = 4.5t.