[填空题]
The small piston of a hydraulic lift has a diametervgttk.m7z 4: f of 8.0 cm, and its large det8( uw4mecg8prt d.prg 3.:k4g f-epistontpdw cd.- uk .efmre8rg peg8(tg4: 43 has a diameter of 40 cm. The lift raises a load of 15,000 N. (a) Determine the force that must be applied to the small piston $N$ (fill in numerical value only) (b) Determine the pressure applied to the fluid in the lift $\times 10^5 \; Pa$ (fill in numerical value only)
