A250 lbm spherical buoy with a 2 ft diameter is tethered to the bed of a lake by a cable. 1 ft of the buoy is submerged in the water. a) sketch the problem and show the forces (i. e. free body diagram) b) what is the tensile force on the cable due to the buoy? c) what did you assume about the density of the buoy?

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?