anonymous
  • anonymous
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?
Physics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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anonymous
  • anonymous
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??
anonymous
  • anonymous
No...but for the second part of that question, is it yes?
anonymous
  • anonymous
imagine when you are in bus.. why do you think you are able to make out the motion???..

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anonymous
  • anonymous
sealed air tight bus.. so no air from outside hits your face :P
anonymous
  • anonymous
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?
anonymous
  • anonymous
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?
anonymous
  • anonymous
Yes of course.
anonymous
  • anonymous
can you tell me.. when is it that it becomes the most obvious to you tat you are moving??
anonymous
  • anonymous
maybe when you take a sharp turn.. or maybe sudden brakes.. thats when its really really obvious right?
anonymous
  • anonymous
Yes.
anonymous
  • anonymous
But when you're accelerating, you can still feel that sudden push/urge.
anonymous
  • anonymous
Is what I just said correct?
anonymous
  • anonymous
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
anonymous
  • anonymous
frame of reference, which is relative to the ground? Okay thanks for your help mate. Appreciate it.
anonymous
  • anonymous
yes.. relative to ground.. :)..
anonymous
  • anonymous
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..
anonymous
  • anonymous
Ah I see. This all makes sense. Everything's come together in my brain. Thank you very much @Mashy. Cheers.
anonymous
  • anonymous
lol.. no problem ;-)

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