148 A 40-1b, 0.8-ft-diameter, 1-ft-tall cylindrical tank slides slowly down a ramp with a constant speed of 0.1 ft/s as shown in Fig. P1.48. The uniform-thickness oil layer on the ramp has a viscosity of 0.2 lbs/ft². Determine the angle, 0, of the ramp. Tank 0.002 ft 0.1 ft/s Oil FIGURE P1.48 flat surface and some measurements of