(Solved):
*4-84. If the couple moment acting on the pipe has a magnitude of \( 400 \mathrm{~N} \cdot \mathrm ...
*4-84. If the couple moment acting on the pipe has a magnitude of \( 400 \mathrm{~N} \cdot \mathrm{m} \), determine the magnitude \( F \) of the vertical force applied to each wrench.