- #1

zuignapje

- 1

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I came across the Transrapid train in Germany. I have a question concerning a formula we used in the report.

## Homework Statement

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.

## Homework Equations

p=F/A, F=m×a and probably many more

## The Attempt at a Solution

We didn't get much further than what is already said above :/

Thanks in advance.