Which of the following statements about the pulleys used in traction systems is correct?

waelhammad

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2022-10-22

A moveable pulley changes the direction of the traction force.
A moveable pulley changes the direction of the traction force and provides a mechanical advantage.
A fi xed pulley changes the direction of the traction and provides a mechanical advantage.
A fi xed pulley is one that is attached to the limb undergoing traction.

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waelhammad

2022-10-22

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B: The provision of a mechanical advantage is the important feature of a moveable pulley. Traction direction is also changed.

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