Answer:
Explanation:
When Cylinder is vertical Let gas pressure inside is [tex]P_1[/tex] and atmospheric Pressure be
[tex]P_0=100 KPa[/tex]
Area of Piston [tex]A=0.2 m^2[/tex]
mass of Piston [tex]m=20 kg[/tex]
from FBD
[tex]mg+P_0A=P_1A[/tex]
[tex]P_1=P_0+\frac{mg}{A}[/tex]
[tex]P_1=100+\frac{20\times 9.8}{0.2}[/tex]
[tex]P_1=100+0.98[/tex]
[tex]P_1=100.98 KPa[/tex]
(b)If cylinder is upside down
From FBD
[tex]mg+P_2A=P_0A[/tex]
[tex]P_2=-\frac{mg}{A}+P_0[/tex]
[tex]P_2=100-\frac{20\times 9.8}{0.2}[/tex]
[tex]P_2=100-0.98=99.02 KPa[/tex]
