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What relationships should be formed here?

  1. Mar 10, 2012 #1
    I am currently doing a senior physics experiment where we are stopping a computer fan (with steel glued on to the blades) with an electromagnet, and measuring the time it takes to stop at varied resistances (using a rheostat).

    I also need to calculate the angular and linear momentum and torque (and possibly other things). I am confused about what relationship should form between the time the fan takes to stop and the resistance - as well as how to go about collecting enough data to calculate the other things (momentum etc.)

    Any help/advice/suggestions would be MUCH APPRECIATED!

    Thanks in advance.
     
  2. jcsd
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