Question

Which of the following is correct?

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

I have been asked this question in my homework.

The question is from Simple Trusses topic in chapter Structural Analysis of Engineering Mechanics

Answer 1

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

The best explanation: The direction of the unknown is not known to us. To know the direction of the unknown force we take the 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.