Work Energy and Power - Result Question 9
11. A force of is required to lift a mass through a pulley system. In order to lift the mass through , the rope has to be pulled through . The efficiency of system is
[2001]
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 11. (b)
Solution:
- (b) Efficiency
i.e., Efficiency,