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Homework Help: Mechanics - Particle Sliding down a sphere

  1. Nov 30, 2008 #1
    Say I had a smooth sphere of radius r, and I placed a particle at the top and it started sliding down the sphere. At which point (lets say the angle to the horizontal with respect to the origin, taking the center of the sphere to be the origin) does the particle separate with (slide off of) the sphere? Assuming that the only force on the particle is the force due to gravity.

    This is not a homework problem, but I'm just curious. Can anyone give me a complete solution? I'm more interested in seeing how it would be done than doing it myself!

    Cheers in advance.

    Oh I've just seen the same question here https://www.physicsforums.com/showthread.php?t=269635 - reply there instead. Okay don't, that post is a bit old. And they seem to think it's been posted before that even, but I can't find it. Anyone give me a link? Or just a solution? :D
    Last edited: Nov 30, 2008
  2. jcsd
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