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### Author Topic: Sum of torque  (Read 145550 times)

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #360 on: August 29, 2016, 12:18:30 AM »
The torque from white depends of 2 pressures
« Last Edit: August 29, 2016, 10:42:43 AM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #361 on: September 02, 2016, 12:12:59 AM »
With 2 pressures

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #362 on: September 04, 2016, 10:58:44 AM »
With my method I found the sum of energy at 0 with a gas or with attracted disks (or spheres) but I don't find the sum of energy at 0 with not attracted disks (or spheres).
The sum of forces are at 0 too.

With gas:
from the torque and the force:  0.5*δ*1.1-0.5=0.05
from the volume: 0.005*10*δ=0.05

Only attracted disks:
from the torque and the force: 0.5*δ*1.1-0.516666=0.03333
from the volume: 0.005*10*δ*0.666=0.03333   , I need to take in account the fact that more disks with pressure at 10 moves out than 0 so I used the calculation of the center of gravity of a square triangle

With disks, attracted disks and not attracted disks
from the torque and the force: 0.9535*1.1*δ-1.045*δ=0.0385δ
from the volume: 0.005δ*9.689=0.04844δ

With spheres, attracted spheres and not attracted spheres
from the torque and the force: 0.87*1.1*δ-1.0361333*δ=0.079δ
from the volume: 0.913*0.005δ*10=0.0456δ

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #363 on: September 07, 2016, 08:35:05 PM »
The tube turns clockwise around the red dot and counterclockwise around the black dot.

The difference of volume are the same.

To find the same volume resolve the equation:

(1.1²-1²)/2*pi-(3.1²-3²)/2*pi/x     this gives x at 2.904761    like that the volume is constant and the difference of energy is 2.90895-1.0004*2.904761=0.003
« Last Edit: September 08, 2016, 01:07:25 AM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #364 on: September 08, 2016, 11:25:47 AM »
Like that

« Last Edit: September 08, 2016, 08:10:49 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #365 on: September 09, 2016, 08:19:11 AM »
Like that
« Last Edit: September 09, 2016, 02:14:31 PM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #366 on: October 01, 2016, 02:32:02 PM »
--

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #367 on: October 04, 2016, 09:15:29 PM »
I take a last idea (first image) but I change a little the device (second image). I place the tube inside water and the tube is full of water, the density of the tube is like water.
« Last Edit: October 05, 2016, 04:49:01 AM by EOW »

#### EOW

• Sr. Member
• Posts: 383
##### Re: Sum of torque
« Reply #368 on: December 17, 2017, 04:56:15 PM »
torque vs translation
« Last Edit: December 18, 2017, 03:15:26 AM by EOW »