Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Pressure with objects

  • 12-09-2013 2:19pm
    #1
    neufneufneuf
    Registered Users, Registered Users 2 Posts: 321 ✭✭


    Hi,

    It's a theorical problem (images). Balls are free to move. Balls repuls themselves like a force function of 1/d². The black object (spiral+cone) is free to turn and it's neutral for balls. Balls are under fixed pressure. All volumes are constant. I'm watching forces F at the top of cone (red color), this forces reduce the torque of this part of object but I don't find where the torque is canceled. Like all big part of spiral is a cylinder, the diameter of cylinder give same distance (balls diametrically opposed) and if I take only a cylinder, I can understand the torque is 0. But with a cone at end, and like radius is greater, for me the torque is lower.

    Can you help to find my error ?

    Thank you in advance


Comments

  • #2
    Aoifums
    Registered Users, Registered Users 2 Posts: 1,126 ✭✭✭Aoifums


    *feels really stupid*

    You'd probably be better off asking this Physics & Chemistry forum


  • #3
    G_R
    Moderators, Education Moderators Posts: 5,028 Mod ✭✭✭✭G_R


    This isn't the right forum I'm afraid, ill move it to a more appropriate one


  • #4
    Lbeard
    Banned (with Prison Access) Posts: 311 ✭✭Lbeard


    neufneufneuf wrote: »

    Balls are under fixed pressure.

    Under pressure from what?
    The black object (spiral+cone) is free to turn and it's neutral for balls.

    Why are the balls resting on it? You're showing two dimensional images, I'm not sure what you are trying to represent.


  • #5
    neufneufneuf
    Registered Users, Registered Users 2 Posts: 321 ✭✭neufneufneuf


    I'm starting new post with new example easier to understand:

    http://www.boards.ie/vbulletin/showthread.php?t=2057039191

    please, read it if you can help me ?


Advertisement