Test analysis: People standing on the ground indicate that the direction of the final pulling force should be downward. When winding ropes, we should not only consider saving energy as much as possible, but also make full use of all pulleys. As shown in the figure, the pulley block uses three ropes to bear the load.

Comments: There are several points to pay attention to when winding rope. First of all, we should use every pulley. Second, pay attention to the direction of the final pulling force. Third, when winding the rope, you should first wind the small pulley inside and then wind the big pulley outside. After winding, the labor-saving situation of pulley block should be finally determined.