What are the two purposes served by pulleys used in traction systems? These are to:

waelhammad

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2022-10-22

reduce friction and provide support for the limbs in traction.
supply a mechanical advantage and attachment points to the bed frame.
allow the hanging masses to exert a traction force greater than their weight, and redirect the direction of the effort force.
change the direction of the cords and suspend the limb from the bed.

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waelhammad

2022-10-22

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C: Pulleys change the direction of the force provided by the hanging masses, and (if the pulley is a moveable one) provide a mechanical advantage.

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