[填空题]
The small piston of a hydraulic lift has a diamj 4 9x,p- 2di,tp:qzufe f(qgneter ovhk +,lom*(ee f 8.0 cm, and its large piston has a diameter of 40 cm. *o el,h+e v(kmThe 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)
