that is pretty much an answer i had presumed.
But,force being a vector quantity has its effect in the direction in which an object accelerates. in the case, when "A" hits "B", "A" accelerates in opp. direction to "B", giving raise to a force in backward direction(the direction from which it is...
in the Newtons second law of motion we study "F=ma" letters having their usual meanings.
so if any object say"A" comes in the way of a huge object "B", moving with a constant velocity; a=0, doesn't the object "a" feel any force upon him?