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05-16 The Train of Physics

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    And the answer is actually this one.
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    If you don't believe me, you should absolutely try this out.
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    Get in a car or on a train and while going along at constant speed,
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    drop an object in front of yourself.
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    You will see that it falls straight down.
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    Now, this may cause you to ask yourself what is going on?
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    I'm seeing the same results when I drop an apple on a train that's moving pretty fast
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    as I see when I drop an apple on the ground, and the ground is stationary, right?
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    Well, in fact, in physics motion at a constant speed is absolutely
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    indistinguishable from being at rest.
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    If you were on this train and you boarded up all the windows,
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    and again remember it's moving perfectly smoothly but at a constant speed,
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    there is no experiment that you could do to determine whether you're moving or at rest.
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    That is pretty mind-blowing, I think.
Title:
05-16 The Train of Physics
Video Language:
English
Team:
Udacity
Project:
PH100 - Intro to Physics
Duration:
0:46
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