Recent content by Magos

  1. M

    High School Is the 2-Dimensional Cross Product Equivalent to a 90-Degree Rotation?

    I'm not even sure such a thing exists :P. Anyway, if it does, is it correct that it is: Xc = -Y Yc = X (rotation 90 deg counter clockwise) Couldn't find anything about it on google...
  2. M

    Undergrad Distance the lower pulley moves all 3 ropes

    Consider this pulley: http://67.18.37.18/1014/142/upload/p1957458.png There has been some discussion at a forum whether this pulley reduces the necessary force to 1/2 or to 1/3 of a "non-pullied" rope. I'm strongly for 1/3 basically since for each distance the lower pulley moves all 3 ropes...