Question

If the unknown variables in the calculations are more than the known quantities, then the number of equations required to solve all the unknown variables are?

(a) Infinite

(b) Finite

(c) Not possible

(d) Question fault

The question was asked during an online interview.

My question comes from Cables in section Internal Forces of Engineering Mechanics

Answer 1

The correct choice is (b) Finite

Easy explanation: Whatever be the calculation involved, the unknown variables will be ultimately come out from the equations. The proper use of the known quantities and the multiuse of various calculation techniques will ultimately give up the results. Thus whether it may be the case of the cables or the beams the equations if applied properly will result in the determination of the unknowns.