If couple forces F are applied to the handle of the machinists vise, determine the compressive force

Question:

If couple forces F are applied to the handle of the machinist’s vise, determine the compressive force developed in the block Neglect friction at the bearing A. The guide at B is smooth. The single square-threaded screw has a mean radius of r1 and a lead of r2, and the coefficient of static friction is μs.

Units Used:

kN = 10³ N

Given:

F = 35 N

a = 125 mm

r₁ = 6 mm

r₂ = 8 mm

μs = 0.27

-F B.