The Achilles tendon force Ft is mobilized when the man tries to stand on his toes. As this is done, each of his feet is subjected to a reactive force of Nt = 400 N. If the resultant moment produced by forces Ft and Nt about the ankle joint A is required to be zero, determine the magnitude ofFt.

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200 mm N= 400 N 65 mm 100 mm