A person of weight W is suspended by both hands from a high bar as shown. The ce

Question

A person of weight W is suspended by both hands from a high bar as shown. The center of mass is directly below the bar.

(a) Find the horizontal and vertical components Fx and Fy , where F is the force exerted by the bar on each of the two hands.

(b) Given the additional information about the arm shown in the second drawing, calculate the components of R , the force exerted by the humerus on the forearm through the elbow, and the tension T in the biceps tendon.

Neglect the weight of the arm, and assume that Tand R are the only forces exerted on the forearm by the upper arm.

Explanation / Answer

a) Horizontal component Fx= W/2cos(10) = 0.51W

Vertical Component Fy = W/2sin(10) = 2.88W

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