Two masses of 14,5 kg and 17,91 kg respectively are firmly attached to a rotating faceplate on a lathe. the 14,5 kg mass is attached at a radius of 91 mm and 17,91 kg mass at a radius of 101 mm from the centre o. the eccentricities of the 14,5 kg mass and the 17,91 kg mass are at an angle of 120° to one another. determine the distance where a 15 kg mass must be placed to balance the system

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?