| Topic: |
Science > Physics |
| User: |
"Jason Stanidge" |
| Date: |
03 Mar 2006 11:54:41 AM |
| Object: |
Investigating mechanics setup? |
What is a good setup to use to investigate the effects of colliding bodies,
rotational motion etc, where friction is negligible?
I've seen tables that produce a cushion of air, but I'm not sure if these
are commercially available, so would I have to build one myself?
Thnaks for any suggestions.
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| User: "DarkMotion" |
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| Title: Re: Investigating mechanics setup? |
03 Mar 2006 04:33:03 PM |
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"Jason Stanidge" <Jameson@nospam.com> wrote in message
news:du9vhe$pf2$1@news6.svr.pol.co.uk...
What is a good setup to use to investigate the effects of colliding
bodies,
rotational motion etc, where friction is negligible?
I've seen tables that produce a cushion of air, but I'm not sure if these
are commercially available, so would I have to build one myself?
Thnaks for any suggestions.
Maybe you just need lubricating oil to reduce friction, or perhaps a base
covered in ice that can be easily cooled using a peltier cell.
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| User: "srp" |
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| Title: Re: Investigating mechanics setup? |
03 Mar 2006 01:01:27 PM |
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Jason Stanidge a écrit :
What is a good setup to use to investigate the effects of colliding bodies,
rotational motion etc, where friction is negligible?
I've seen tables that produce a cushion of air, but I'm not sure if these
are commercially available, so would I have to build one myself?
Thnaks for any suggestions.
They are commercially available if you have a budget. Look up
Science Kit, Sargent Welsch, Deadalon Corporation among others.
They carry more than one type, some not expensive but not totally
practical, some practical but more expensive.
André Michaud
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| User: "PD" |
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| Title: Re: Investigating mechanics setup? |
03 Mar 2006 01:08:55 PM |
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Jason Stanidge wrote:
What is a good setup to use to investigate the effects of colliding bodies,
rotational motion etc, where friction is negligible?
I've seen tables that produce a cushion of air, but I'm not sure if these
are commercially available, so would I have to build one myself?
Thnaks for any suggestions.
http://froogle.google.com/froogle?q=air+hockey&hl=en&btnG=Search+Froogle
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| User: "Puppet_Sock" |
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| Title: Re: Investigating mechanics setup? |
03 Mar 2006 12:28:28 PM |
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Jason Stanidge wrote:
What is a good setup to use to investigate the effects of colliding bodies,
rotational motion etc, where friction is negligible?
I've seen tables that produce a cushion of air, but I'm not sure if these
are commercially available, so would I have to build one myself?
They are commerically available. Highschool teachers get catalogues
that sell them all the time. They might be foolishly expensive compared
to alternatives. We had a table and a track when I was in grade 12.
(That's roughly age 17 for countries with different school systems.
Just before entering university.)
You might get someplace with an air hockey table as a starting point.
It just has to be flat enough to make a good surface without contact.
The next thing is a strobe light and a camera that can take pics with
very long exposure times and sensitivity such that the strobes don't
blow out the entire pic. You may have to do a lot of nudge-n-poke to
get the settings reasonable on this. But it's a way you can get fairly
good results. For example, a collision can be studied by putting
dots on the colliding objects such that you can see motion of the
centre and rotation. Then each strobe makes a "frame" and you can
tell how the motion changes by knowing the timing of the strobes.
Possibly a budget digital camera would be ok for this, but be sure
you can set exposures long enough. Then you can load the image
into a computer with a paint program that lets you put the mouse over
a location and get the x-y coords in the image.
If I recall, there's even a PSSC student exercize book on good
experiments to do with such a setup.
Socks
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