A mass of 8.0 kg rests on the horizontal table top having a coefficient of kinetic friction uk = 0.25. The mass on the table top is joined to a 6.0 kg suspending body mass by means of a string passing over a pulley which is joined to the hanging body. Suppose that the system consists of no losses such as friction, pulley inertias and the like. Use energy techniques to determine the speed of the system after the hanging body have descended 3.0 m once; the system has been free from rest.