2. A rectangular rosette strain gage (Figure 2.20b) is cemented to the free surface of a machine part made of class 30, gray cast iron (Table A.1). In a test of the part, the following strains were recorded: = 0.00080, = 0.00010, and = 0.00040. Determine the stress components at the point on the surface with respect to the x-y axis shown. y' Figure 2.20b 20