Q. 21 A thin plate of uniform thickness is subject to pressure as shown in the figure
below
Under the assumption of plane stress, which one of the following is correct ?
(A) Normal stress is zero in the z -direction
(B) Normal stress is tensile in the z -direction
(C) Normal stress is compressive in the z -direction
(D) Normal stress varies in the z -direction
Answer: (A)
Explanation:
