Question

what is the resultant force when two equal forces act on an object in the same direction

Answer 1

The direction of the net force determines the direction of the object's motion. When two forces act in the same direction, they add together. When forces act in opposite directions, they are combined by subtracting the smaller force from the larger force.
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Answer 2

the resultant is sum of individual forces
for example two forces f1 and f2 act on a abject in the same direction then resultant is f1+f2