Recent content by juan gce

  1. J

    Is a Perfect Circle Possible Given the Limitations of Pi and Space?

    We messure in straight lines .. pi .. comes naturally to make messures of a circle .. that simple and plain .. The circle's perimeter in euclidean geometry is 2pi r
  2. J

    What force(s) make(s) change of direction in a pulley

    Thanks jtbell It ocurred to me, I have not seen it in any textbook. I just wonder if there is some way to treat "skewing" forces in the classical physics. In a thought ideal situation with the usual conditions: no friction, no weight but to the two masses cart and the balance weight, having...
  3. J

    What force(s) make(s) change of direction in a pulley

    The problem might be posed through 90 degrees, where the vertical weight comes to change to a horizontal force .. how? and what does the weightless center of the pulley play there. Is the obvius expresible in terms of equations based on classical physics? (what if the obvious results as the...
  4. J

    What force(s) make(s) change of direction in a pulley

    A way to predict that fact?
  5. J

    What force(s) make(s) change of direction in a pulley

    My guess is this: at the pulley at every point forces anule (first law). Taking any angle from a horizontal line passing through the center of the pulley, as the rope is attached tangentially to the wheel, we may draw an inclined cartesian plane where each of the forces -horizontal and...
  6. J

    What force(s) make(s) change of direction in a pulley

    Hi guys .. Glad to be here in this forum of physcs fans. This is the classical problem of cart HORIZONTALLY pulled by a rope that wraps around a pulley and it's pulled VERTICALLY by say, the same mass as the cart (yeah T1 = T2 horizontal and vertical tensions .. = in MAGNITUDE BUT NOT IN...
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