A shaft with diameter 80 mm rotates at 400 r/min within a bearing. The coefficient of friction between the contact surfaces is 0,04. The radial force exerted by the shaft on the bearing is 30 kN, which results in a frictional loss. Calculate the following: 3 The circumferential speed in m/s (v) The frictional force The power loss due to friction Calculate the power consumed by the following: 7.1.2 7.1.3 7.2.1 7.2.2 A shaper operation in which the cutting force by 850 N and a stroke length of 150 mm takes 6 s to complete A lathe operation in which the cutting force applied to the tool is 750 N and the rotational speed of the workpiece with a diameter of 300 mm is 250 r/min