Analysis: Because they have the same weight and height, they can ignore the images caused by different gravity. Assuming that two people start to move at a uniform speed, the acceleration of A (A) =2a (B) is twice the current speed after the same time, and the pulling force of a is greater during the movement, because to maintain a greater acceleration, F (A) =ma (. So F (A) =2 (B). At this time, the analysis of A shows that the resultant force of the rope (not human) on the A side is equal to F (A) -F (B) =ma (B), and the rope moves downward at the acceleration a (B), so the actual speed of A is equal to the movement of A relative to the rope minus the downward speed of the rope, which is synthetic.

At this time, for Party B, the rope on Party B's side moves upward with the acceleration of A (B) because of Party A, and Party B moves upward with the acceleration of A (B) relative to the rope because of the function of F (B), then the actual movement of Party B should be the speed of Party B relative to the rope plus the speed of the rope itself, that is, it moves upward with the two accelerations of A (B)! According to H = 1/2t 2, when B moves to the top, A just moves to the middle! Note: (My high school physics level assumes a certain acceleration. If it is a variable acceleration, I need to use integration, so this A is a certain moment of motion, but the corresponding relationship between A and B is the same at each moment, so the answer after integration is the same! )

I hope I can help you!