I was wondering if anyone could explain to me a little issue I have with Newton's Third law of motion. I understand the law in general (action an reaction are equal and opposite; can be seen by a book on table not accelerating towards the ground and staying at rest as per Newton's first law).
What I do not understand is why there is a limit to this. If I place a 10N object on my desk, it will stay there, but for an object of the same volume weighing 10^6N, it would go straight through it. If Newton's third law is correct why is there no equal and opposite reaction force stopping it? Is there one, but the sheer weight breaks the table the instant the reaction force appears, thus dissipating it? I don't know...
Any help would be appreciated,
VannR