| Topic: |
Science > Physics |
| User: |
"Kyle" |
| Date: |
18 Mar 2005 05:33:42 PM |
| Object: |
fly inside car question |
Hi,
When a car is moving fast and there is a fly flying inside
the car. We can say their velocity initially starts from
the moving car. But if they keep flying for let's say 5
minutes, how come they don't slow down with respect to
the moving car?
Kyle
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| User: "CWatters" |
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| Title: Re: fly inside car question |
19 Mar 2005 06:35:11 AM |
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"Kyle" <relativitystud@yahoo.com> wrote in message
news:1111188822.419532.317570@o13g2000cwo.googlegroups.com...
Hi,
When a car is moving fast and there is a fly flying inside
the car. We can say their velocity initially starts from
the moving car. But if they keep flying for let's say 5
minutes, how come they don't slow down with respect to
the moving car?
Kyle
Assume a sealed car with blacked out windows....
As long as the car continues at a _constant velocity_ the fly has no way of
knowing if the car is moving or not. You don't feel the earth moving do
you? -yet it's going round at quite a high speed.
If the car were to _accelerate_ the fly would find himself moving w.r.t to
the car because he is more dense than the air.
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| User: "Gregory L. Hansen" |
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| Title: Re: fly inside car question |
18 Mar 2005 08:44:19 PM |
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In article <1111188822.419532.317570@o13g2000cwo.googlegroups.com>,
Kyle <relativitystud@yahoo.com> wrote:
Hi,
When a car is moving fast and there is a fly flying inside
the car. We can say their velocity initially starts from
the moving car. But if they keep flying for let's say 5
minutes, how come they don't slow down with respect to
the moving car?
They keep flying? The fly keeps flying? The fly slows down with respect
to the moving car? I'm having trouble parsing this.
--
"Not that there's anything wrong with just lying around on your back. In
its way, rotting is interesing too... It's just that there are other ways
to spend your time as a cadaver." -- Mary Roach, "Stiff", 2003.
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| User: "" |
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| Title: Re: fly inside car question |
18 Mar 2005 05:57:39 PM |
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Kyle wrote:
Hi,
When a car is moving fast and there is a fly flying inside
the car. We can say their velocity initially starts from
the moving car. But if they keep flying for let's say 5
minutes, how come they don't slow down with respect to
the moving car?
Kyle
Kyle--the fly doesn't slow down for the same reason your stomache
doesn't end up in the backseat while you drive. The fly is contain in a
moving medium (air) inside the car. If you open the window and let the
fly, out what happens? For the same reason, if you're flying in a jet
supersonic (faster than speed of sound)--you can talk to the guy in the
backseat of the enclosed cabin--but it gets real quite (for the most
part) outside.
Good question
Tut
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| User: "Kyle" |
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| Title: Re: fly inside car question |
18 Mar 2005 07:01:06 PM |
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wrote:
Kyle wrote:
Hi,
When a car is moving fast and there is a fly flying inside
the car. We can say their velocity initially starts from
the moving car. But if they keep flying for let's say 5
minutes, how come they don't slow down with respect to
the moving car?
Kyle
Kyle--the fly doesn't slow down for the same reason your stomache
doesn't end up in the backseat while you drive. The fly is contain in
a
moving medium (air) inside the car. If you open the window and let
the
fly, out what happens? For the same reason, if you're flying in a jet
supersonic (faster than speed of sound)--you can talk to the guy in
the
backseat of the enclosed cabin--but it gets real quite (for the most
part) outside.
Good question
Tut
So you mean to say the air molecules inside the car is moving
with respect to the car even if there are no windshield at the
front and back? How can that be??
Kyle
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| User: "" |
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| Title: Re: fly inside car question |
18 Mar 2005 08:21:53 PM |
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Kyle wrote:
cnctutwiler@wmconnect.com wrote:
Kyle wrote:
Hi,
When a car is moving fast and there is a fly flying inside
the car. We can say their velocity initially starts from
the moving car. But if they keep flying for let's say 5
minutes, how come they don't slow down with respect to
the moving car?
Kyle
Kyle--the fly doesn't slow down for the same reason your stomache
doesn't end up in the backseat while you drive. The fly is contain
in
a
moving medium (air) inside the car. If you open the window and let
the
fly, out what happens? For the same reason, if you're flying in a
jet
supersonic (faster than speed of sound)--you can talk to the guy in
the
backseat of the enclosed cabin--but it gets real quite (for the
most
part) outside.
Good question
Tut
So you mean to say the air molecules inside the car is moving
with respect to the car even if there are no windshield at the
front and back? How can that be??
Kyle
No, the air is trapped in the car with you and the fly when the windows
are up. As Sam Wormley told you--the fly, yourself and the air are in
the same medium or sealed space together-- traveling down the road
together as a unit. For an example, what if the fly were inside a
balloon that you were holding as mom drove to town--what would you see
as you looked at it? Would you expect it to slow down over time and end
up at the back of the balloon? No. Now imagine you are in the balloon
with the fly? The example is the same as being in the car with the
windows up and doors closed--the balloon now is the inside of the car.
Does that answer your question?
question?
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| User: "Sam Wormley" |
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| Title: Re: fly inside car question |
18 Mar 2005 06:24:46 PM |
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Kyle wrote:
Hi,
When a car is moving fast and there is a fly flying inside
the car. We can say their velocity initially starts from
the moving car. But if they keep flying for let's say 5
minutes, how come they don't slow down with respect to
the moving car?
Kyle
All motion is relative Kyle. The fly's environment is inside
the car. Your environment is inside the car. If there were
no acceleration or bumps (and you couldn't see out the window)
you wouldn't be able to tell if the car was moving or not...
same for the fly. GPS receiver not allowed.
When ever you use the word "move" you must also think "with
respect to...".
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| User: "tj Frazir" |
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| Title: Re: fly inside car question |
18 Mar 2005 07:55:29 PM |
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If you had to ask yer an idiot.
If you answer the idiot yer stupid.
I dont know how poeple get so stupid.
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| User: "" |
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| Title: Re: fly inside car question |
19 Mar 2005 08:00:14 AM |
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tj Frazir wrote:
I dont know how poeple get so stupid.
Tut says--
Very dear one--they eat to many gravity waves. ;-)
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| User: "Kyle" |
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| Title: Re: fly inside car question |
19 Mar 2005 06:08:02 AM |
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Sam Wormley wrote:
All motion is relative Kyle. The fly's environment is inside
the car. Your environment is inside the car. If there were
no acceleration or bumps (and you couldn't see out the window)
you wouldn't be able to tell if the car was moving or not...
same for the fly. GPS receiver not allowed.
When ever you use the word "move" you must also think "with
respect to...".
The keyword here is "air". It is the air inside the car
that is keeping the fly steady in the car. If the fly is above
a train. The velocity of the fly would become slower and
the train would move ahead of it.
This reminds me about the MMX-Aether experiment.
What if the aether is like air that is stuck on earth (either
via gravity or matter coupling). Then the MMX should
produce null results (in the same way the fly produce
null velocity changes with respect to the car.
Well. Of course there is no aether like the God of
Physics (Einstein) himself said.
Anyway. What's the best arguments to counter this
aether being stuck on earth like air reasoning. Since light
travels so much faster. The moving earth aether and
the stationary cosmic aether would not have much
difference in light deviations. But then how would you
know the positions of stars are really where they
originally are and not moved via the different aether
frame of reference.
I know there is no aether. I just want to get the best
arguments against what I just described above so I
can explain it to people who may offer that reasoning.
Thanks.
Kyle
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| User: "" |
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| Title: Re: fly inside car question |
20 Mar 2005 05:22:04 PM |
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Kyle--it would appear that your real motive here is to sell answers to
your questions at groupsrv.com/science. Recommend you inform potential
responders of this fact to avoid any potential legal issues.
Good luck
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