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Non uniform circular motion

  1. Feb 24, 2010 #1
    I see in the description of non-uniform circular motion in a text book, referring to a ferris wheel, that the velocity of an object at the bottom must be twice the velocity at the top, but it is not mathematically shown and it is not immediately obvious to me. Can someone show a simple mathematical demonstration of that?
  2. jcsd
  3. Mar 18, 2010 #2


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    Are you sure that is what is said? If the point on top has velocity v, the point on the bottom must have the same speed but opposite direction so velocity -v. The difference in velocities is v- (-v)= 2v but it is NOT true that one is "twice" the other.
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