Page 259 - Bài 1 ok_Neat
P. 259
To achieve the highest MA with the least number of pulleys requires constructing a
compounded system of a 2:1 simple pulley system acting on a 2:1 simple pulley system,
acting on a 2:1 and so forth. As each pulley is added to such a system, the mechanical
advantage increases exponentially (e.g. 2:1, 4:1, 8:1, 16:1, 32:1, etc.).
When constructing a compound pulley system, critically think of all the possible
combinations that when multiplied together will equal your desired MA; then consider
the advantages and disadvantages of each and determine which combination will best
meet your needs given your available equipment and working constraints.
(a) Compound 4:1 (Simple 2:1 pulling on Simple 2:1)
(b) Compund 6:1 (Simple 3:1 pulling on Simple 2:1)
172 | P age