A garage uses a hydraulic jack to lift cars for servicing. The small piston has an area of 2.5cm2 and the large piston has an area of 300cm2. A car of weight 15kN is to be raised.
(i) Calculate the minimum force that must be applied on the small piston to lift the car.
(ii) Determine the mechanical advantage offered by the jack.
(iii) A mechanic weighing 700N stands on the small piston. State with reason whether his weight alone is sufficient to lift the car.