T = ____N R = ______N ? = ______ When a person stands on tiptoe (a strenuous pos

Question

T = ____N
R = ______N
? = ______ When a person stands on tiptoe (a strenuous position), the position of the foot is as shown in figure (a). The total gravitational force on the body, vector F g, is supported by the force narrowbold exerted by the floor on the toes of one foot. A mechanical model of the situation is shown in figure (b), where vector T is the force exerted by the Achilles tendon on the foot and vector R is the force exerted by the tibia on the foot. Find the values of T, R, and ? when Fg = n = 700 N. (Do not assume that vector R is parallel to vector T .)

Explanation / Answer

Sum vertical force components: ?Fy = T*cos? - R*cos15

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