. The single-threaded screw of the vise has a mean diameter of 1 in. and has 5 square threads per inch. The coefficient of static friction in the threads is 0.2. A 60-lb pull applied normal to the handle at A produces a clamping force of 1000 lb between the jaws of the vise. (a) determine the frictional moment MB, developed at B, due to the thrust of the screw against the body of the jaw. (b) determine the force Q applied normal to the handle at A required to loosen the vise. a B 6" Ꮎ MB to tighten 10" MB to loosen C A8 8"

. The single-threaded screw of the vise has a mean diameter of 1 in. and has 5 square threads per inch. The coefficient of static friction in the threads is 0.2. A 60-lb pull applied normal to the handle at A produces a clamping force of 1000 lb between the jaws of the vise. (a) determine the frictional moment MB, developed at B, due to the thrust of the screw against the body of the jaw. (b) determine the force Q applied normal to the handle at A required to loosen the vise. a B 6" Ꮎ MB to tighten 10" MB to loosen C A8 8"