They add together. *Note: when dealing with vector forces, adding them together could result in larger, smaller or even negative numbers, based upon the signs' of the original numbers
No, they can NEVER act in the same directions.
If they are equal in values - nothing. Otherwise, it will move to the same direction as the direction of the greater force.
The two forces are of the same magnitude, act in opposite directions, and act on different objects.
If this happens then they will get pushed apart. Otherwise nothing really will happen unless there is objects at the end were it is pushing.
No. When two forces act in the same direction, they can be added together. It is only when two identical forces act in opposite directions that they cancel each other out.
vector sum of the two forces.
Pay attention and study
The object accelerates in the direction of the force difference.
gummy worms
Zero.
In that case, the resultant will either be the sum or the difference of the two forces (if they act in the same direction) or their difference (if they act in opposite directions).
Assuming the two forces are acting ON THE SAME OBJECT, you can subtract the two forces, to get the net force. Important: This does not apply to Newton's Third Law, since the forces act on DIFFERENT OBJECTS. I mention this because people tend to get this confused.