Question

Numericals


Two cylindrical vessels fitted with piston a and b are you of cross section 8 cm² and 320 cm² respectively ,are joined at their bottom by a tube and they are completely filled with water. when a mass of 4 kg is placed on piston A, find :
i) the pressure on piston A,
ii) the pressure on piston B, and
iii) the thrust on piston B.​

Answer 1

Answer:

Given

Force applied to the smaller piston A=4 kg

Area of cross section of piston A=8 cm2

Area of cross section of piston B=320 cm2

(i) Pressure acting on piston A in the downwar direction=AreaThrust

=84=0.5 kg/cm2

∴ Pressure acting on piston A=0.5 kg/cm2

(ii) according to pascal's law

Pressure acting on piston A= Pressure acting on piston B=0.5 kg/cm2

(iii) Thrust acting on piston B in the upward direction=Presuure×Area ofB

=4×832=160 kg

∴ Thrust acting on piston B in the upward direction=160 kg