Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Half a sphere

  1. Jun 2, 2007 #1

    Nea

    User Avatar

    1. The problem statement, all variables and given/known data
    The half a sphere with a 'm' mass and 'r' radius is equilibrated on a plan absolutely polished horizontal with the side of the AB wire. So the surface of the half a sphere has with the horizontal plan an alpha angle. Find, after the break of the wire, the velocity of the O center and her maximal value too, also the maximal value of the pressure of the half-sphere over the horizontal. Find that for small angles it behaves like a mathematical pendulum.
    Illustration:
    http://img135.imageshack.us/img135/9526/fiz1rf6.th.jpg [Broken]

    2. Relevant equations



    3. The attempt at a solution

    I think that the lagrange's equations can be employed to solve it.
     
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Jun 3, 2007 #2

    Dox

    User Avatar

    Hello.

    I think that using Lagrange's methods won't help you. The best you can do is using Newton... use vectors!

    Regards.
     
  4. Jun 7, 2007 #3
    I would use newton as well but I think it will take some work to draw the components and figure out which contributes to the torque in which way
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook