Characteristics and winding method of pulley block

Features
Experimenting with pulleys, it is easy to see that although using pulleys saves effort, it costs distance - the distance moved by power is greater than the distance the goods are lifted.
Winding method
To draw the winding method of the pulley block, you must first analyze the question requirements, which is to reduce the force several times (a fraction of the original). F=G/n, n is the number of segments of the rope carrying the heavy object. Note: If n is an even number, then the starting point of the winding is on the upper fixed pulley; if n is an odd number, then the starting point of the winding is on the lower movable pulley. That is the "odd and even definite" theorem.