Athree-point bending test is performed on a spinel (mgal2o4) specimen having a rectangular cross section of height d = 3.8 mm and width b = 9 mm; the distance between support points is 25 mm.

(a) compute the flexural strength if the load at fracture is 350 n.
(b)the point of maximum deflection δy occurs at the center of the specimen and is described by

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.