In order to prevent muscle contraction from misaligning bones during healing (wh

Question

In order to prevent muscle contraction from misaligning bones during healing (which can cause a permanent limp), injured or broken legs must be supported horizontally and at the same time kept under tension (traction) directed along the leg. One version of a device to accomplish this aim, the Russell traction apparatus, is shown in the figure. This system allows the apparatus to support the full weight of the injured leg and at the same time provide the traction along the leg.(Figure 1)

Part A

If the leg to be supported weighs 49.0 N , what must be the weight of W?

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Part B

What traction force does this system produce along the leg?

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Figure 1 of 1

In order to prevent muscle contraction from misaligning bones during healing (which can cause a permanent limp), injured or broken legs must be supported horizontally and at the same time kept under tension (traction) directed along the leg. One version of a device to accomplish this aim, the Russell traction apparatus, is shown in the figure. This system allows the apparatus to support the full weight of the injured leg and at the same time provide the traction along the leg.(Figure 1)

Part A

If the leg to be supported weighs 49.0 N , what must be the weight of W?

W =   N  

SubmitMy AnswersGive Up

Part B

What traction force does this system produce along the leg?

F =   N  

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Provide FeedbackContinue

Figure 1 of 1

Explanation / Answer

Here ,

let the tension in wire is T

T = weight of leg

T = 49 N

Now , for the supported weight

W = T

W = 49 N

the weight of the weight W is 49 N

Now , for the traction force

Ft - 2 * T * cos(25) = 0

Ft = 2 * 49 * cos(25)

Ft = 88.82 N

the traction force acting is 88.82 N

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