A pulley is used because it:

Has the mechanical advantage greater than one

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Has 100% efficiency

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Helps to apply the force in a convenient direction

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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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Similar questions

A single fixed pulley is used because it :

(a) ha sthe mechanical advantage greater than 1

(b) has the velocity ratio less than 1

(d) helps to apply the effort in a convenient direction.

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