Question

An electromagnet crane is carrying the electromagnet with the help of the three cables. But the electromagnet is not stable because of the wind. What is science behind the cause?

(a) The wind is making the net force of the body equal to a non-zero value

(b) The wind is making the net force of the body equal to zero value

(c) The wind is making the net force of the body equal to a non-zero value but is supporting the equilibrium

(d) The wind is making the net force of the body equal to zero value and supporting equilibrium

This question was addressed to me in final exam.

The above asked question is from Three Dimensional Force System in portion Equilibrium of a Particle of Engineering Mechanics

Answer 1

The correct option is (a) The wind is making the net force of the body equal to a non-zero value

The best explanation: Anybody is in equilibrium only if the net force along the three axis is zero. But in this case, the wind is not helping the body to do so. The science behind this is that the resultant forces are being equated to a non-zero value by the wind. Hence unstable.