State if balanced or unbalanced force: When spring is stretched

When balanced forces act on an object at rest, the object will not move. For example, if you push against a wall, the wall pushes back with an equal but opposite force , so it is a balanced force.

Forces that cause a change in the motion of an object are unbalanced forces. Unbalanced forces are not equal and opposite.

If spring is stretched and held ion that position then the force is balanced. This is because we have to apply equal force from both sides to stretch the spring. These forces are equal and opposite so they are balanced.