Question

How do you figure net force for opposite forces?

Answer 1

first of all If two forces act on an object in opposite directions and they don't exactly cancel, what is left over is the net force (the difference in the forces).

In the diagram in the attachment, the net force is 2 Newtons to the right. If two(or more) forces act on an object in the same direction, the net force is the sum of the forces.

Answer 2

Forces Acting in Opposite Directions. In general, whenever forces act on an object in opposite directions—like the book on the table—the net force is equal to the difference between the two forces. In other words, one force is subtracted from the other to calculate the net force.