You are given four pulleys and three strings. Draw a neat and labelled diagram to use them so as to obtain a maximum mechanical advantage equal to 8. In your diagram mark the directions of load, effort and tension in each strand. What assumptions have you made to obtain the required mechanical advantage?
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a fixed pulley and 3 movable pulleys.. ma = 2^n ..n = no of movable pulleys.. 2^3 = 8 ..done.. the digram u can guess. 1st 3 movable pulleys. then a single fixed pulley..
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hence it is right ans w .....
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