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Question
There is no gain in mechanical advantage in the case of a single fixed pulley. Explain, why the pulley is then used?
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Solution
It is used only to change the direction of effort to a more convenient direction and to use one’s own weight for the effort.
RELATED QUESTIONS
From the diagram given below. answer the question that follows:

1) What kind of pulleys are A and B?
2) State the purpose of pulley B.
3) What effort has to be applied at C just raise the load L = 20 kgf?
(Neglect the weight of pulley A and friction)
Select the correct alternative:
A pulley is used because of it
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