An accident victim with a broken leg is being placed in traction. The patient we
ID: 2275656 • Letter: A
Question
An accident victim with a broken leg is being placed in traction. The patient wears a special boot with a pulley attached to the sole. The foot and boot together have a mass of 4.0 kg, and the doctor has decided to hang a 6.0 kg mass from the rope. The boot is held suspended by the ropes and does not touch the bed
The net traction force needs to pull straight out on the leg. What is the proper angle ? for the upper rope?
What is the net traction force pulling on the leg?
An accident victim with a broken leg is being placed in traction. The patient wears a special boot with a pulley attached to the sole. The foot and boot together have a mass of 4.0 kg, and the doctor has decided to hang a 6.0 kg mass from the rope. The boot is held suspended by the ropes and does not touch the bed The net traction force needs to pull straight out on the leg. What is the proper angle ? for the upper rope? What is the net traction force pulling on the leg?Explanation / Answer
The tension in the rope T = Mw*g = 6.0*9.8 = 58.8 N
For the leg to be pulled straight out, the vertical components of forces on the leg must sum to zero.
The vertical component from the lower part of rope is -T*sin15
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