Oct 29, 2008· In a hydraulic lift, the radii of the pistons are 2.18 cm and 9.4 cm. A car weighing W = 10.6 kN is to be lifted by the force of the large piston. (a) What force Fa must be applied to the small piston? correct check mark N (b) When the small piston is pushed in by 10.7 cm, how far is the car lifted? mm (c) Find the mechanical advantage of the lift, which is the ratio W / Fa.