Two masses m 1 and m 2 are connected by a light string which passes over the top of an inclined plane making an angle of 30 0 with the horizontal such that one mass rests on the plane and other hangs vertically. It is found that m 1 hanging vertically can draw m 2 up the full length of the incline in half the time in which m 2 hanging vertically draws m 1 up the full length of the incline. Assuming the surfaces in contact to the frictionless and pulley to be light and smooth, we have -