Class 11 Physics | Fluid Statics | #15 Pascal's Principle of Pressure Distribution | For JEE & NEET

[@deepapandey822]

Sir consider a vessel half filled with water now I closed the lid will the pressure at any point be equal to Patm + hpg or hpg + (pressure due the air present inside the vessel) Thank you in advance

[@physicsgalaxyworld]

As air above the water is at atm pressure so it will be Patm + hρg

[@adityaraj8159]

Sir but atmospheric pressure is due to weight of whole particles present above it.... So how it can be equal to Patm + hpg

[@vishwajeetchoudhary8264]

@@adityaraj8159 weight in per unit area And that will be same inside too

[@ananthr1583]

Sir,How does this justify the conservation of energy

[@rashadalam2879]

Sir why not f1=f2 i mean if system has to be at rest then net force must be 0 on system

[@pranavnarware6366]

bro force can't be same as cross sectional area is different in 2nd picture. if force will be equal so pressure will be different

[@namangoyal9651]

Sir what is the pressure at top point of container in case 1

[@physicsgalaxyworld]

It is zero as no air is there above the liquid... You can understand it in a different way also if in case of a completely filled closed container if we make a hole at bottom, liquid comes out and vacuum is created above the water as its level decreases at top (water evaporation is neglected here)

[@riteshuppal1357]

At 5:08 can you please explain that if the force F1 is removed...then the piston will apply a force F1 or F2 towards left!?

[@DeepakSingh-or3cl]

On a horizontal level I.e along the central line pressure will be equal since along that line forces in x direction cancels out as it is stationary! ( x direction equilibrium)

[@riteshuppal1357]

Deepak Singh i meant to ask...that what amount of force will the piston apply in the left...if F1 is removed !?

[@p.ramyashri4110]

F2

[@pratikkumar4709]

@@riteshuppal1357 F1

[@tpsicmin]

Thanks Sir

[@SumanDas-qs1qh]

Sir why p1=p2 I have not understood

[@physicsgalaxyworld]

because tube is horizontal and atmospheric pressure is constant outside...

[@SumanDas-qs1qh]

@@physicsgalaxyworld sir but area is inversely proportion to area for eg in case of a blade since area is less therefore pressure is more that's why we can cut vegetables into pieces, sir that's why I was having doubt in p1 and p2

[@dadawankhede9461]

Thank u sir

[@BP-on2nw]

Sir are your videos sufficient for jee mains??

[@alphaiitd1]

Thanks sir