Water is lifted from a well via a wheel and axle,if the water weighs 300N by an applied force of 120N.calculate the efficiency of the machine if the radii of the wheel and axle is 600mm and 110mm

Answer 1

ideal ratio of output to input = 600/110 = 5.455
actual ratio of output to input = 300/120 = 2.5
output /input = .458 = 45.8 %