Question #f84db

1 Answer
Jul 31, 2017

As long as the pulling force is not greater than the force holding the string to the wall, it is *not unbalanced*.

It's the same situation when you have an object at rest on the floor; if the mass is increased, that increases the downward force it exerts on the surface, but at the same time increases the normal force exerted on the object by the surface; the net force is still zero regardless of the mass.

Pulling on the string with different force magnitudes will also change the tension of the string where it's attached to the wall, so in a sense the tension force "adjusts" to the pulling force.

And if the pulling force is greater than the force exerted by the wall (or whatever is keeping it in place), the pulling force will pull the string free.