A body of mass 25kg, moving at 3ms-1 on a rough horizontal floor, is at rest after sliding through a distance of 2.50m on the floor. Calculate the coefficient of sliding friction. [g = 10.0ms\(^{-2}\)]
A wheel and axle of radii 800mm and 200mm respectively is used to raise a body of weight 800N by the application of 250N. Calculate the efficiency of the machine
