When a person stands on tiptoe on one foot (a strenuous
Chapter 12, Problem 42(choose chapter or problem)
When a person stands on tiptoe on one foot (a strenuous position), the position of the foot is as shown in Figure P12.42a. The total gravitational force F S g on the body is supported by the normal force n S exerted by the floor on the toes of one foot. A mechanical model of the situation is shown in Figure P12.42b, where T S is the force exerted on the foot by the Achilles tendon and R S is the force exerted on the foot by the tibia. Find the values of T, R, and u when Fg 5 700 N.
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