Problem 4: A 150 N force is applied to the control lever at A. Knowing the distance AB is 250 mm, determine the moment of the force about B when a is 50°. 20% B 150 N Problem 5: Use the figure from problem 4. Knowing that the distance AB is 250 mm, in what direction a should the 150 N force act to generate the maximum moment about B? Calculate the maximum moment about B caused by the 150 N force. Problem 6: Draw the FBD for the given system. Ignore the body load. Show the correct number of reactions for the given boundary conditions. Do not solve for the reactions. A