A thin cantilever-supported rectangular plate is made of a brittle material. The plate w...

A thin cantilever-supported rectangular plate is made of a brittle material. The plate will crack along line AB when the moment about this line reaches 200N·m. The plate also has a deep scratch along line CD and will crack when the moment about this line reaches 100N·m. The forces F and Q act in the -z direction.

If Q = 0, determine the value of F that will cause the plate to crack.