# Two boys pull a rope in the two edges with the force 50 N each. Will the rope rip if it can handle only a pull of 80 N? [closed]

I think we should make the sum the two forces 50+50=100 N and say it can't handle? Can you explain me using the 3rd Newton Law?

Newton 3 talks about the fact that A exerts a force F on B, then A must feel that force too. A cannot feel more or less than the force he is exerting - that would be a short path to violation of conservation of momentum (if A and B are both floating in space, then $F\Delta t$ for A must be equal and opposite to $F\Delta t$ for B so that their total momentum is unchanged; and since they feel the force for the same amount of time, the direction of the forces felt must be equal and opposite).