The figure above is an anatomical sketch of the leg and hip bones indicating the

Question

The figure above is an anatomical sketch of the leg and hip bones indicating the forces acting on them. We is the weight of the body. The weight of the leg (WL) is 1/7 of W and it acts as shown in the figure.

A) Compute F1 in terms of W.

B) Compute the magnitude and direction of the reaction force R.

The figure above is an anatomical sketch of the leg and hip bones indicating the forces acting on them. We is the weight of the body. The weight of the leg (WL) is 1/7 of W and it acts as shown in the figure. Compute F1 in terms of W. Compute the magnitude and direction of the reaction force R.

Explanation / Answer

Rx = Fcos(70 degree) = 1.57*cos(70 degree) W = 0.54 W

Ry = Fsin(70) + W - W/7 = W(1.57*sin(70 degree) + 1 - (1/7)) = 2.33 W

R = sqrt(2.33^2+0.54^2) W = 2.39 W

direction = 180+arctan(2.33/0.54) = 257 degrees counterclokwise

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