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Homework Help: MagLev train energy requirements

  1. Mar 14, 2012 #1
    In class I've built a Maglev train. In the report we should also cover the theory behind the Maglev train though.
    I came across the Transrapid train in Germany. I have a question concerning a formula we used in the report.

    1. The problem statement, all variables and given/known data
    We used the following formula: P = Cw×Afront×(density of surrounding air)/2
    (see http://en.wikipedia.org/wiki/Transrapid#Energy_requirements)
    Our teacher wants us to tell what this formula actually derives from (such as p=F/A and F=m×a)
    We are however unable to solve this.

    2. Relevant equations
    p=F/A, F=m×a and probably many more

    3. The attempt at a solution
    We didn't get much further than what is already said above :/

    Thanks in advance.
  2. jcsd
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