Problem 7 When force P is applied to the rigid arm ABC , point B displaces vertically,r downward through a distance of 0.2 mm . Determine the normal strain developed in wire CD. Problem 8 If the applied force P causes the rigid arm ABC to rotate clockwise about pin A imugh an angle of [1.02 ", determine the normal strain developed in wires ED and CE. HI} mm e+4 The rectangular plate is deformed into the shape of a rhombus shown by the dashed line . Determine Problem 9 the average shear strain at corner A with respect to the x and y axes