Two people pull the rope in opposite directions applying a force of 150N. What is the pulling force of the rope?

The rope pulling force will be equal to the force 150 (N). At first glance, it seems that the strength will be twice as large. But, in fact, this is absolutely not the case. Imagine that the rope is fixed to the wall and one person pulls the rope with a force of 150 (N), in this case it becomes obvious that the force will be equal to 150 (N). That is, we just replaced the second person with a fixed wall. And immediately, everything became obvious.