Science Project

Kinda Vague, but what exactly are you doing it on?

Are you just writing up info about unicycling, then you only have to
search this site and the rest of the net.

If your comparing unicycles, then unicycle.com etc

--
timmy_nz
------------------------------------------------------------------------
timmy_nz's Profile: http://www.unicyclist.com/profile/11157
View this thread: http://www.unicyclist.com/thread/45991

Yea you might need to explain your ideas a bit, I know there are some
people who are good at science here so... Explain and you will get
more ideas shot at you.

Mike

--
swarbrim

😄 add me at [email hidden]
------------------------------------------------------------------------
swarbrim's Profile: http://www.unicyclist.com/profile/11005
View this thread: http://www.unicyclist.com/thread/45991

One really good idea for a HS science project on unicycling might be to
investigate frictional forces between the tire and the floor. What
movements in unicycling depend on friction, which ones don't. Which
direction is the frictional force directed for different tricks? How
could that knowledge help riders pick the right riding surface and
tire combination for certain tricks.

Just an idea!
Blake

--
podzol

THE MISSING WHEELS TOUR DA YOOP!
Check out the charity ride, planning is under way.
Seeking riders and support.
*http://missingwheels.unicyclist.com/ *
------------------------------------------------------------------------
podzol's Profile: http://www.unicyclist.com/profile/10131
View this thread: http://www.unicyclist.com/thread/45991

How about the spinning wheel and centrifugal force?

--
Trapper
------------------------------------------------------------------------
Trapper's Profile: http://www.unicyclist.com/profile/10341
View this thread: http://www.unicyclist.com/thread/45991

How about different metals used for frames and the comparsion between
strength and weight. Or, look into the different types of Hubs (
splined, cauterless, and cautered), compare them and state the various
pros and cons as they may be.

--
chauncy

:eek: -Chauncy!!- :eek:
------------------------------------------------------------------------
chauncy's Profile: http://www.unicyclist.com/profile/11278
View this thread: http://www.unicyclist.com/thread/45991

Trapper said:

How about the spinning wheel and centrifugal force?

just so you know jeff there is no such thing as centrifugal
force...only centripetal force, just so you dont use wrong info if you
decide to use this in your project. good luck!🙂

-paul

--
spasmo
------------------------------------------------------------------------
spasmo's Profile: http://www.unicyclist.com/profile/10932
View this thread: http://www.unicyclist.com/thread/45991

spasmo said:

just so you know jeff there is no such thing as centrifugal force...only
centripetal force, just so you dont use wrong info if you decide to use
this in your project. good luck!🙂

-paul

Centrifugal force is a force that is the same magnitude as the
centripetal force, but in the opposite direction.

--
Gilby
------------------------------------------------------------------------
Gilby's Profile: http://www.unicyclist.com/profile/1
View this thread: http://www.unicyclist.com/thread/45991

I for one believe in the all-mighty Centrifugal Force. It is a great
being. All you need is faith.

On a more real note, I'm not sure that there are too many
unicycle-specific projects that you could create. I think that so far
this is a pretty decent idea:

podzol said:

One really good idea for a HS science project on unicycling might be to
investigate frictional forces between the tire and the floor. What
movements in unicycling depend on friction, which ones don't. Which
direction is the frictional force directed for different tricks? How
could that knowledge help riders pick the right riding surface and tire
combination for certain tricks.

I don't think there are many opportunities for gyroscopic/*Centrifugal*
Forces to be exparimented on a unicycle, as they have no applications.
Furthermore, the way cranks play with the rotation patterns of a
spinning unicycle wheel would through stuff off quite a bit.

In Centrifugal Force we trust!

--
Spudman

*| B B|* This space owned by Fly '😎'
(http://www.unicyclist.com/forums/VBGooglemap.php)
*| I O |* This space owned by Frees*TYLER!*
*| L A |* *MERCYME owns this space!!!* . . . . . . . .
. . . . . .*X* <--Chosen's spot
*| L R |* This space owned by unijesse
*|__'-' (www.selectric.org)____'D'
(http://www.cathodecorner.com/nixiewatch/index.html)___|* This space
rendered by forrest
------------------------------------------------------------------------
Spudman's Profile: http://www.unicyclist.com/profile/10752
View this thread: http://www.unicyclist.com/thread/45991

use physics !!!! and get osme ryan atkins vids ! or put soething about
bio on that thing on world's guiness record where they say that kris
holm is more then human for his crazy balance.. ***not guines record
ripleys belive it or not..

--
maxisback

Quiters never win, winners never quit , the ones who never win and never
quit are just dumb
------------------------------------------------------------------------
maxisback's Profile: http://www.unicyclist.com/profile/10885
View this thread: http://www.unicyclist.com/thread/45991

write about the first unicycles where they rided penny fartings with the
rear wheel in the air.🙄

--
freddy

Fredrik, Norway. )--O
My little album: http://tinyurl.com/dvf6s
------------------------------------------------------------------------
freddy's Profile: http://www.unicyclist.com/profile/11355
View this thread: http://www.unicyclist.com/thread/45991

wow, heaps of ideas

Yeah, physics give a range of ideas. And then there's chemistry where
you could talk about materials used and strenghts and stuff.

--
timmy_nz
------------------------------------------------------------------------
timmy_nz's Profile: http://www.unicyclist.com/profile/11157
View this thread: http://www.unicyclist.com/thread/45991

Something about how much energy you spend accellerating and
deaccellerating in order to stay ballanced. You could do some
comparisons if you are on average 10, 5, or 2 degrees out of
equilibrium or something like that. You'd have to simplify the problem
somewhat, but that'd probably be ok for a school project.

--
Borges
------------------------------------------------------------------------
Borges's Profile: http://www.unicyclist.com/profile/925
View this thread: http://www.unicyclist.com/thread/45991

podzol said:

One really good idea for a HS science project on unicycling might be to
investigate frictional forces between the tire and the floor. What
movements in unicycling depend on friction, which ones don't. Which
direction is the frictional force directed for different tricks? How
could that knowledge help riders pick the right riding surface and
tire combination for certain tricks.

Just an idea!
Blake

What, exactly, doesn't rely on friction? I was pretty sure everything
relys on friction (between the ground and the tire) to make it work.
(Try riding on ice with a bald tire, and see how difficult it is).

--
nick

later,
nick http://www.extreme.unicyclist.com
------------------------------------------------------------------------
nick's Profile: http://www.unicyclist.com/profile/349
View this thread: http://www.unicyclist.com/thread/45991

nick said:

What, exactly, doesn't rely on friction? I was pretty sure everything
relys on friction (between the ground and the tire) to make it work.
(Try riding on ice with a bald tire, and see how difficult it is).

Well I know the answer, there is one class of moving parts on a
unicycle that one wants zero friction (well ideally, but you do want
the lowest friction possible) but it it HIS science project!!! I'm not
going to write it for him!!!

--
podzol

THE MISSING WHEELS TOUR DA YOOP!
Check out the charity ride, planning is under way.
Seeking riders and support.
*http://missingwheels.unicyclist.com/ *
------------------------------------------------------------------------
podzol's Profile: http://www.unicyclist.com/profile/10131
View this thread: http://www.unicyclist.com/thread/45991

podzol said:

Well I know the answer, there is one class of moving parts on a unicycle
that one wants zero friction (well ideally, but you do want the lowest
friction possible) but it it HIS science project, and I'm not going to
write it for him!!!

Between the tire an the surface, there are times when friction becomes
more or less critical during certain manuvers. the direction of the
frictional force will also change.

My point is that friction is always critical between the tire and the
ground. If you can think of some time when it's not (other than jumping
perfectly vertically, which is somewhat impossible) PM me to let me
know, sometimes I'm wrong.

I think I somewhat misinterpreted you're original post. I wasn't
thinking of moving parts on the unicycle, I was thinking of woving the
unicycle as a whole.

--
nick

later,
nick http://www.extreme.unicyclist.com
------------------------------------------------------------------------
nick's Profile: http://www.unicyclist.com/profile/349
View this thread: http://www.unicyclist.com/thread/45991

Jeff,

If you've got access to software like 'Videopoint' you might try
looking at a video of someone (yourself!) hopping or jumping. Compare
the height gained by the bottom of the wheel to that gained by the
rider's centre of mass - there's usually quite a difference. SImilar
stuff has been done for track & field athletes and ballet dancers -
Nijinsky was famous for seeming to fly across the stage. Check out
-The Physics of Dance- by Kenneth Laws. Or grab a copy of Halliday &
Resnick's classic physics book, -Fundamentals of Physics- (5th ed.) and
look at Chap. 9.
Good luck!

DF

--
dforbes
------------------------------------------------------------------------
dforbes's Profile: http://www.unicyclist.com/profile/4502
View this thread: http://www.unicyclist.com/thread/45991

Gilby said:

Centrifugal force is a force that is the same magnitude as the
centripetal force, but in the opposite direction.

Centrifugal, or centre fleeing, force is simply the lack of centripetal
force. See it like this, you have a string with a marble on the end. If
you swing it, the string becomes taut and the marble goes around in
circles. Your hand is holding the string, and the string makes sure the
marble doesn't leave the circle. So the force keeping the marble going
round and round is directed inwards. If centrifugal force was equal to
centripetal force, the marble would be going in a straight line, as the
two forces together would be 0 and have no effect. This is also why a
circular motion is the only motion where an object can be accelerated,
yet not change it's velocity. (It is always receiving an accelerating
inwards, F = ma, where F and m are a constant, and thus a is as well.)

--
Erant

Live free, prosper, and under my rule.
------------------------------------------------------------------------
Erant's Profile: http://www.unicyclist.com/profile/9986
View this thread: http://www.unicyclist.com/thread/45991

Erant said:

Centrifugal, or centre fleeing, force is simply the lack of centripetal
force. See it like this, you have a string with a marble on the end. If
you swing it, the string becomes taut and the marble goes around in
circles. Your hand is holding the string, and the string makes sure the
marble doesn't leave the circle. So the force keeping the marble going
round and round is directed inwards. If centrifugal force was equal to
centripetal force, the marble would be going in a straight line, as the
two forces together would be 0 and have no effect. This is also why a
circular motion is the only motion where an object can be accelerated,
yet not change it's velocity. (It is always receiving an accelerating
inwards, F = ma, where F and m are a constant, and thus a is as well.)

Gilby's right: centrifugal force is a measurable phenomenon equal and
opposite to the centripetal force, that scientists use all the time
(centrifuges are an example). the force, however, not simple, it is a
residual effect of the spinning mass's inertia, which wants to keep it
going straight. Spinning objects are under constant accelleration
(constantly changing velocity vectors). Centrifugal force is the same
in principle as when we feel ourselves being forced upon when he are
accellerating or slowing in an elevator. Gravity always effects us the
same, gravitational forces don't increase or decrease, but we feel a
force becasue of out inertia ans out accellerating or decellerating
state. If you put a scale beneath us, the scale would even read
differently! But we we never really gain gravitational weight.

--
podzol

THE MISSING WHEELS TOUR DA YOOP!
Check out the charity ride, planning is under way.
Seeking riders and support.
*http://missingwheels.unicyclist.com/ *
------------------------------------------------------------------------
podzol's Profile: http://www.unicyclist.com/profile/10131
View this thread: http://www.unicyclist.com/thread/45991

podzol said:

Erant said:

Centrifugal, or centre fleeing, force is simply the lack of centripetal
force. See it like this, you have a string with a marble on the end. If

snip snip

Quoted message said:

Quoted message said:

circular motion is the only motion where an object can be accelerated,
yet not change it's velocity. (It is always receiving an accelerating
inwards, F = ma, where F and m are a constant, and thus a is as well.)

Gilby's right: centrifugal force is a measurable phenomenon equal and
opposite to the centripetal force, that scientists use all the time
(centrifuges are an example).

No. Centrifugal force is a observed apparent effect of circular
motion, but the force itself does not exist - it is the transmission
of centripetal force that gives rise to the same effects as if
centrifugal force existed on a part of a body.

Do a free-body diagram for the body that you think is being subject to
centrifugal force, and there is no outwards acting force on it.

However, Erant is wrong to say a body undergoing circular motion is
not changing its velocity. Its speed may not change, but its
velocity (being a vector) certainly does, since the direction of
motion is continually changing. Is this context, it is not reasonable
to simplify 'velocity' to be synonymous with 'speed'.

Quoted message said:

in principle as when we feel ourselves being forced upon when he are
accellerating or slowing in an elevator.

Exactly - and that force doesn't actually exist. Your legs feel as if
something is pressing down on you. You feel heavier as the elevator
lifts you, but there is no additional downward force being applied to
you - only an upward force applied to part of you (the soles of your
feet).

regards, Ian SMith
--
|\ /| no .sig
|o o|
|/ \|