Question

Which of the following is correct for space trusses?

(a) To know the direction of the unknown force we take assumption of it

(b) The direction of the unknown force is known to us already

(c) The direction of the unknown can’t be determined

(d) The direction of the unknown is of no use, it is not founded

This question was addressed to me in examination.

I need to ask this question from Space Trusses in section Structural Analysis of Engineering Mechanics

Answer 1

Correct answer is (a) To know the direction of the unknown force we take assumption of it

For explanation: The direction of the unknown is not known to us. To know the direction of the unknown force we take assumption of it. That is we assume that the particular direction might be the direction of the force and then we do the calculations accordingly.