Kiley, jermaine, and gunther are playing tug-of-war. kiley and jermaine are on the same side of the rope, and gunther is on the other side. kiley is exerting a force of 20 n, and jermaine is exerting a force of 25 n.

which force would result in a balanced force for the game?

Kiley and Germaine pull together, resulting in a force of 45N which pulls the rope that way ===> .

In order to balance the forces on the rope, Gunther must pull the rope with a force of 45N this way  <===, all by himself.

The net force on the rope will then be zero, and the rope will not accelerate.  (Although the tension inside the rope will be 90N.)

By the way . . . I'd love to see how the kids manage to all get on the "sides" of the rope.  I would have expected them to just do it the easy way and stand at the "ends" of the rope.

found in the nucleus

has mass of one amu