A. 2. 4. A cast-steel flywheel has a specific weight of 0.28 lb/in. The allo stress is to be 550 psi. Find the maximum velocity of the rim at the mean radius. D. 70.8 fps B. 72.6 fps C. 80.7 fps A. 90.9 fps 5. A coil-spring of stiffness 4 kN/m is cut exactly at the middle and the two springs thus made are arranged in parallel to take up together a compressive load. The equivalent stiffness of the two springs is A. 4 kN/m B. 8 kN/m C. 16 kN/m D. 24 kN/m 6A heavy-duty sleeve bearing is used with good ventilation. The bearing has a kins 2