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Velocity Problem (person/subway)

  1. Apr 2, 2013 #1
    1. If you are walking forward at 2 m/s in a subway that is going 80 m/s, then someone outside the subway will observe you to be moving at?


    3. I think you just add it up so 82 m/s?


    Also, what happens if velocity is zero, is acceleration nonzero or is there not enough information to tell what acceleration is?
     
    Last edited: Apr 2, 2013
  2. jcsd
  3. Apr 2, 2013 #2

    PeterO

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    With the subway car going past at that speed [288 kilometres per hour!!!] anyone outside the subway will probably have their eyes shut and be hanging onto a railing for dear life!

    That aside - the person would be seen to be travelling at 82 m/s.

    There does not seem to be enough information to ascertain and acceleration.
     
  4. Apr 8, 2013 #3
    Thank You!!
     
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