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Azteck Group Title

Can a passenger in a closed carriage of a train travelling at constant velocity across a very smooth section of the Nullarbor Plain demonstrate or measure that they are moving relative to the ground? Could they measure a change in velocity [ie. acceleration] from within that frame of reference?

  • one year ago
  • one year ago

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  1. Mashy Group Title
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    why don't you think about it... the entire earth is moving around the sun in a circular motion.. but the circle is so big.. that we can think of it as almost a straight line motion with constant speed.. now you tell.. is it possible for you to make out .. that earth is moving??

    • one year ago
  2. Azteck Group Title
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    No...but for the second part of that question, is it yes?

    • one year ago
  3. Mashy Group Title
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    imagine when you are in bus.. why do you think you are able to make out the motion???..

    • one year ago
  4. Mashy Group Title
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    sealed air tight bus.. so no air from outside hits your face :P

    • one year ago
  5. Azteck Group Title
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    SO basically what are you saying about the second part of the question? Could you determine the acceleration of the train in that frame of reference?

    • one year ago
  6. Mashy Group Title
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    well.. i want you to think.. when you are inside a bus... can you or can you not make out whether you are moving or not?

    • one year ago
  7. Azteck Group Title
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    Yes of course.

    • one year ago
  8. Mashy Group Title
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    can you tell me.. when is it that it becomes the most obvious to you tat you are moving??

    • one year ago
  9. Mashy Group Title
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    maybe when you take a sharp turn.. or maybe sudden brakes.. thats when its really really obvious right?

    • one year ago
  10. Azteck Group Title
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    Yes.

    • one year ago
  11. Azteck Group Title
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    But when you're accelerating, you can still feel that sudden push/urge.

    • one year ago
  12. Azteck Group Title
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    Is what I just said correct?

    • one year ago
  13. Mashy Group Title
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    yes.. so when you are accelerating.. you get that pseudo force we call it as an inertial force.. during a right turn you tend to go towards left..(centrifugal force ).. and hence you can make out motion!.. so acceleration can be made out within the frame of referrence

    • one year ago
  14. Azteck Group Title
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    frame of reference, which is relative to the ground? Okay thanks for your help mate. Appreciate it.

    • one year ago
  15. Mashy Group Title
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    yes.. relative to ground.. :)..

    • one year ago
  16. Mashy Group Title
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    when you are in uniform motion, if you look at the ground.. you dunno whether the ground is going back or you are moving forward.. infact both are right.. thats where Eisntien talked about relative motion.. he said that motion is only a relative term.. but when we talk about accelerated motions.. its no longer relative.. cause you feel the inertial force..

    • one year ago
  17. Azteck Group Title
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    Ah I see. This all makes sense. Everything's come together in my brain. Thank you very much @Mashy. Cheers.

    • one year ago
  18. Mashy Group Title
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    lol.. no problem ;-)

    • one year ago
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