Q:

The magnitude of the traction force in a Hamilton-Russell traction is determined by

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The magnitude of the traction force in a Hamilton-Russell traction is determined by


  1. The vector addition of the forces in the cords
  2. The hanging mass multiplied by 9.8.
  3. The component of the patient’s weight that is perpendicular to the bed.
  4. The number of pulleys in the system.

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A: The moveable pulley allows the one cord to exert more than one force on the leg. So the magnitude of the force is determined by adding the forces vectorially. 

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