A1/2-in.-diameter structural steel rod was loaded in tension to fracture. the 8.00-in. gage length of the rod was marked off in 1.00-in. lengths before loading. after the rod broke, the strain in the 2.00-in. length containing the fracture was found to be 0.450 in./in., and the total elongation of the other 6 in. was found to be 1.50 in. determine the average strain for the 8.00-in. gage length.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.