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Question

A pulley is used because it:

A
Has the mechanical advantage greater than one
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B
Has 100% efficiency
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C
Helps to apply the force in a convenient direction
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D
Requires more effort to raise a less load
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Solution

The correct option is C Helps to apply the force in a convenient direction
A single fixed pulley does not reduce the effort but helps in changing the direction of effort applied. As it is far easier to apply effort in a downward direction, the single fixed pulley is widely used.

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