A cubic shape body is subjected to stress as shown in the figure below. Both are stresses are equal in magnitude but opposite in direction. Calculate the shear stresses on black plane and green plane.

A cubic shape body is subjected to stress as shown in the figure below

1.	A cubic shape body is subjected to stress as shown in the figure below. Both are stresses are equal in magnitude but opposite in direction. Calculate the shear stresses on black plane and green plane.
A.	Black=σ, green=0
B.	Black=σ, green=σ/2
C.	Black=σ/2, green=σ/2
D.	Black=σ, green=σ
Answer» C.