A) Consider an orthogonal cutting operation with a thickness of uncut layer of 1 mm and a took rake angle of 7o . You measure the chip thickness to be 1.5 mm. Assuming that Merchant’s equation holds, what is the friction coefficient between the tool and the chip? b) In the same set up, the rake angle is changed to 17o . Assuming that this did not affect the friction condition between the tool and the chip, what do you expect the chip thickness to be?