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principles of physics

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The main reason railroad trains remain on their tracks has to do with the ____________________. A) None of these.B) beveled shape of the wheel circumference.C) independence of opposite wheel motions.D) All of these.
E) flange on their wheels.

  • principles of physics -

    The flange keeps the wheels on the track when negotiating a curve. The beveling effectively provides slightly different diameters so that the inside and outside wheels can move at slightly different speeds on curves, so that a differeential is not needed. See
    http://www.engineersedge.com/wwwboard/posts/4355.html

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