When force P is applied to the rigid arm ABC, point B displaces vertically downward through a distance of 0.30 mm (Figure 1) Figure 400 mm- D B 1 of 1 200 mm 300 mm Part A Determine the normal strain developed in wire CD. Express your answer using three significant figures. 1 . 11 Ivec ECD= Submit Provide Feedback Request Answer mm/mm