| Topic: |
Science > Physics |
| User: |
"Michael Sherlock" |
| Date: |
12 Oct 2005 11:43:51 AM |
| Object: |
How height affects velocity |
Hello,
I am going to investigate how the height at which object falls from affects
the velocity at which it falls. Can anyone give me any scientific background
information on this experiment as it would be extremely useful.
Regards,
James
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| User: "Order of the Solar Temple" |
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| Title: Re: How height affects velocity |
12 Oct 2005 12:16:08 PM |
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"Michael Sherlock" <msherlock@blueyonder.co.uk> wrote in message
news:b3b3f.108053$RW.93318@fe2.news.blueyonder.co.uk...
Hello,
I am going to investigate how the height at which object falls from
affects the velocity at which it falls. Can anyone give me any scientific
background information on this experiment as it would be extremely useful.
Regards,
James
The shape of the object you drop is very important, and the drag.
This will limit your test
Google Terminal Velocity
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| User: "Uncle Al" |
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| Title: Re: How height affects velocity |
12 Oct 2005 12:15:34 PM |
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Michael Sherlock wrote:
Hello,
I am going to investigate how the height at which object falls from affects
the velocity at which it falls. Can anyone give me any scientific background
information on this experiment as it would be extremely useful.
Stokes' law, aerodynamic coefficient. Table of atmospheric density,
viscosity, whatever vs. height. Terminal velocity. Brachistochrone,
tautochrone. What if you are in a space station with artificial
gravity provided by spin? Coriolis acceleration.
WGS84,
g =
(978.032677)[1+(0.00193185139)sin^2(lat)]/sqrt[1-(0.00669437999)sin^2(lat)]
cm/sec^2
dg/dh = 0.000308766[1-(0.0014665)sin^2(lat)] cm/meter-sec^2
If the dropped object is electrically conductive, do you get eddy
currents with the Earth's mangnetic field?
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| User: "PD" |
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| Title: Re: How height affects velocity |
12 Oct 2005 12:02:29 PM |
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Michael Sherlock wrote:
Hello,
I am going to investigate how the height at which object falls from affects
the velocity at which it falls. Can anyone give me any scientific background
information on this experiment as it would be extremely useful.
Regards,
James
Several 9th-grade general science books talk both about the
acceleration due to gravity and terminal velocity.
Nevertheless, your experimental study is encouraged. Your chief
challenge is going to be how to measure velocity. You could do it the
way that they do it at drag races: 2 sets of photosensors placed a
small distance apart, with the inputs tied to the start/stop gates of a
digital timer. You can go to a grocery store supplier to find out where
they purchase the photosensors for the food belts, and a digital timer
can probably be found at Radio Shack. The license to drop things from a
high spot that is not on your property will probably cost you more than
the equipment.
PD
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| User: "Sam Wormley" |
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| Title: Re: How height affects velocity |
12 Oct 2005 11:52:18 AM |
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Michael Sherlock wrote:
Hello,
I am going to investigate how the height at which object falls from affects
the velocity at which it falls. Can anyone give me any scientific background
information on this experiment as it would be extremely useful.
Regards,
James
You'll need to take into consideration that acceleration do to
gravity changes with height.... Newton's law of gravitation.
And I suspect you will want to take into account air resistance
which varies with height...
NASA would have need to work this in detail for the Manned Space
Program.
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