Qxi.xli
Badges: 20
Rep:
?
#1
Report Thread starter 5 months ago
#1
if you were to press down on the disk on one side, why does the disk on the other side rise? like whats the reason, in terms of pressure, for that to happen? Why does the volume of water below that disk decrease? cant find an answer to this specifically...

many thanks
Attached files
0
reply
Joinedup
Badges: 20
Rep:
?
#2
Report 5 months ago
#2
I guess it's supposed to be a closed hydraulic system filled with an incompressible liquid.

The volume of the incompressible liquid has to remain constant because it can't be compressed and can't escape... So if one piston goes down the other has to go up
0
reply
Qxi.xli
Badges: 20
Rep:
?
#3
Report Thread starter 5 months ago
#3
(Original post by Joinedup)
I guess it's supposed to be a closed hydraulic system filled with an incompressible liquid.

The volume of the incompressible liquid has to remain constant because it can't be compressed and can't escape... So if one piston goes down the other has to go up
this sounds stupid but why does the piston go down? when the piston goes down, the volume of water below it decreases, so the pressure of the water on the disk decreases? is that correct? xx
0
reply
Joinedup
Badges: 20
Rep:
?
#4
Report 5 months ago
#4
(Original post by Qxi.xli)
this sounds stupid but why does the piston go down? when the piston goes down, the volume of water below it decreases, so the pressure of the water on the disk decreases? is that correct? xx
The pressure is just force per unit cross sectional area

The small disk has mass 1kg and cross sectional area 1... 1/1 is 1 so the pressure is one
The big disk has twice the mass and twice the area ... 2/2 is 1 so the pressure is one

it should be in equilibrium IMO
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

How would you feel if uni students needed to be double vaccinated to start in Autumn?

I'd feel reassured about my own health (20)
16.81%
I'd feel reassured my learning may be less disrupted by isolations/lockdowns (38)
31.93%
I'd feel less anxious about being around large groups (12)
10.08%
I don't mind if others are vaccinated or not (13)
10.92%
I'm concerned it may disadvantage some students (5)
4.2%
I think it's an unfair expectation (29)
24.37%
Something else (tell us in the thread) (2)
1.68%

Watched Threads

View All