Teach your kids relativity! - VeggieBoards
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#1 Old 05-26-2007, 10:40 PM
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. . . or refresh on it yourself!







http://www.onestick.com/relativity/
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#2 Old 05-26-2007, 10:42 PM
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This is clearly the work of Satan.
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#3 Old 05-27-2007, 10:50 AM
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interesting!
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#4 Old 05-27-2007, 10:52 AM
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haha. I really loved this. thanks.
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#5 Old 05-27-2007, 02:41 PM
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"From Al's perspective, the ground is moving and he is not."



That confuses me. And I'm only like, 20 seconds into this thing. The ground is moving? Or the floor of the train? Huh?
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#6 Old 05-27-2007, 03:00 PM
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Quote:
Originally Posted by veggiejanie View Post

"From Al's perspective, the ground is moving and he is not."



That confuses me. And I'm only like, 20 seconds into this thing. The ground is moving? Or the floor of the train? Huh?



not the floor of the train...the ground outside, the landscape.
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#7 Old 05-27-2007, 03:05 PM
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Quote:
Originally Posted by isowish View Post

not the floor of the train...the ground outside, the landscape.



But doesn't Al know the ground outside isn't moving, and that he really is instead? Or am I just thinking too much about it?
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#8 Old 05-27-2007, 03:07 PM
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Quote:
Originally Posted by veggiejanie View Post

But doesn't Al know the ground outside isn't moving, and that he really is instead? Or am I just thinking too much about it?



they are both moving ... relative to each other that's kinda the point
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#9 Old 05-27-2007, 03:10 PM
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look out the window, is the ground moving?

doesn't look like it, but it's flying around the sun.

the beginning talks about the relativity of perspective and movement, then gets into the relativity of time.



temporal relativity is awesome.
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#10 Old 05-27-2007, 03:11 PM
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Quote:
Originally Posted by isowish View Post

they are both moving ... relative to each other that's kinda the point

So, if he is moving and so is the ground (obviously), then why do they say "from his perspective" he isn't moving? He knows he's moving...so... ?



Argh. I don't like (read: understand) physics.
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#11 Old 05-27-2007, 03:12 PM
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Quote:
Originally Posted by troub View Post

look out the window, is the ground moving?

doesn't look like it, but it's flying around the sun.

the beginning talks about the relativity of perspective, then gets into the relativity of time.



relativity is awesome.



So is relativity just saying this:?



- A is moving.

- It may not look like A is moving,

- but A is actually moving.
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#12 Old 05-27-2007, 03:33 PM
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Well, once you get into time it's a bit more than that. As time itself slows/speeds up depending on your perspective.
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#13 Old 05-28-2007, 05:05 PM
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That was a nice way to put the the special theory of relativity without getting into the math. Although the paradox bit (at the end) resolving it with the Doppler effect is just not right...





Quote:
Originally Posted by veggiejanie View Post

So is relativity just saying this:?



- A is moving.

- It may not look like A is moving,

- but A is actually moving.



No. It's just a matter of perspective. Kind of like the grass is always greener from the other side.



If you were in a box moving at a constant velocity, (say on the Earth) there'd be no way to tell if you were moving or not, unless you had a window (assuming the box didn't jostle around like in a car or train).



Or we were in space and we were both moving at a constant velocity in opposite directions, it would seem from my point of view that you were traveling in one direction with a velocity (and I was holding still) where as from your point of view I was traveling in the opposite direction, with the same speed, but you were holding still. This is assuming you couldn't see the stars...



If that made any sense...

I believe everything.
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#14 Old 05-28-2007, 05:25 PM
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i got as far as the squished cop before i got lost
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#15 Old 05-28-2007, 07:57 PM
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This is all emotionally moving for me.
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#16 Old 05-28-2007, 08:14 PM
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This is all emotionally moving for me, because my perspective relationship with a relative on a train, got squished.
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