Item 2 2 of 25 Part A While a fractured tibia (the larger of the two major lower

Question

Item 2 2 of 25 Part A While a fractured tibia (the larger of the two major lower leg bones in mammals) is healing, it must be held horizontal and kept under some tension so that the bones will heal properly to prevent a permanent limp. One way to do this is to support the leg by using a variation of the Russell traction apparatus. (See the figure) The lower leg (including the foot) of a particular patient weighs 53.3 N, all of which must be supported by the traction apparatus. (Figure 1) What must be the mass of W, shown in the figure? kg Submit Prevlous Answers Request Answer Figure 1of1 X Incorrect; Try Again; 6 attempts remaining Part B What traction force does the apparatus provide along the direction of the leg? 83° 37° Submit Previous Answers Request Answer

Explanation / Answer

here ,

as the tension in the wire is same

for the net force on the ring in upper direction

W * sin(83 - 37) - W * sin(37) - 53.3 = 0

solving for W

W = 453 N

the weight W is 453 N
part B)

along the direction of leg

force along the direction of leg = W * cos(37) + W* cos(83 - 37)

force along the direction of leg = 453 * (cos(37) + cos(83 - 37))

force along the direction of leg = 676 N

the force along the direction of leg is 676 N

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