The Achilles tendon force Ft, is mobilized when the man tries to stand on his toes. As thi...

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 of Ft.