Newton thirt low of motion explalin the two forces namely action and reaction coming into action when the two bodies are in contact with each other?
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Answer:
Why does it move? Because when we move an object forward, we're also being moved backward. That's the Newton's third law, and it's absolutely correct.
But you often see that when we move an object, we seem to not move at all. That's a deceiving look. The third law says F = F', but F depends on mass from the relation F = ma. So even though both objects get the same force, it depends on how big the mass of each object, the bigger the object, the smaller the acceleration it gets, thus the smaller the distance it travels compared to the other object. We do move backward, but the move is so small that we hardly notice.
When you're playing ice skating, pick one of your friend that more or less has the same weight with you. Stand facing each other. Then try to push him, you would notice that you would also be pushed backward with more or less the same speed you give to him. Pick another friend that has a weight twice from you. Then when you push him, you would notice that you would be pushed backward with more or less twice the speed of whatever the speed your fat friend acquires. Both of you experience the same force, but as your fat friend has mass twice from you, he acquire just half of the acceleration you get. Thus he moves with the speed just half of your speed.