1. The radii of the bigger piston and the smaller piston are in the ratio 50:4.If 20N acts on the smaller piston, calculate the force on the bigger piston.


2. The blood pressure of a patient is 160/100. Express the lower Pressure in SI units. (g=10/s2; and density of Hg =13600 kg /m3)

(1) Force is given by F= W=mg=Gm/R2               R1:R2=50:4             F1F2=R22R12=4502                 F1=162500×20=0.128N(2) 160/100 shows the mercury height  So pressure=ρ×g×h                                                  P=13600×10×100mm                                                P=13.6×103paskals=13.6Kpascals

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