2. An integral obstruction-type chip breaker has a chip-breaker height of 1 mm and a chip-breaker distance of 4 mm. It is found that the chip is broken satisfactorily when the chip thickness is 0.8 mm. What chip- breaker distance should be provided for an attached obstruction-type chip breaker to give the same performance as the integral obstruction- type chip breaker if the chip breaker height is 2 mm and the chip- breaker wedge angle is 45 deg? (Assume that the chip-tool contact length is equal to the chip thickness.)