How does a net force affect an object?
The net force on an object is just the sum of all outside forces. So the affect of any non-zero net force is to cause an acceleration in the direction of the force.
For instance if we had a 2 kg ball on a number line and we then push on the ball with a 2 N force in the negative direction and a 3 N force in the positive direction then the net force on the object would be 1 N in the positive direction.
<----O------> = O-->
We can determine the acceleration of the object by applying Newton's Second Law.
Solve for a
So the acceleration caused by the net force in this example would be