Question

Two children are pulling on a rope in opposite directions. Child A is pulling with 100N of force to the left. Child B is pulling with 50N of force to the right. What is the net force, and which direction will the rope move?

Answer 1

left and the net force is 150

Answer 2

Newton second law of motion is applicable to this question. Newton second law of motion states that a change in motion is proportional to the force applied and it occurs in the direction of the force.
Mathematically, F = F1 - F2
Where F is the net force, F1 is the force in the positive direction while F2 is the force in the negative direction.
For the given question,
F1 = 100N
F2 = 50N
F = 100- 50 = 50.
Therefore, the net force is 50 N.
The net force is 50 N and the force will move the rope in the LEFT direction.