calculate the efforts applied in a upward direction in case of a single movable pulley which lifts a bucket of water of weight 30kgf, if efficiency of the given pulley system is 60%.
The options are :
(i) 12.5kgf
(ii) 25kgf
(iii) 125kgf
(iv) 1.25 kgf
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Answer:
(2) 25 kgf
explanation:
efficiency = work done by load / work done by effort
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