The answer of this question is C) - 5N..
why the answer is not A), considering both the forcez are in the opposite direction?
The spring will stretch.
Of the same two are over a pulley, and force is applied, there will be tension/ force. Similar case.
Think o it this way - the net acceleration of the spring is 0(net force is zero). So to counter the left 5N, tension 5N acts in right direction, and vice versa.
So, it means, Tension do not equalize each others.. unlike force..?
Yes think as tension equilizes the force applied.
The force has to be transmitted across the spring - it isn't a point mass. So the two forces applied can't cancel each other. So the tension is the force which is equalizing the force applied.
The forces are not cancelling each other as they aren't applied on the same point.
And the direction of tension depends on the direction of the force, as in pulley. There are no '2' tensions in the spring. Its one force only, which is acting in both directions.