How do you figure net force for opposite forces?

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.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy