Toy Physics - Part 1: Woodpecker on Pole
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- čas přidán 7. 10. 2008
- Dr. Dave and Dr. Tom explain the physics of a wooden woodpecker toy involving friction, impact, and dynamics.
This toy was purchased at a U Silly Goose store.
A technical analysis can be found in the technical paper:
Leine, R.I., Van Campen, D.H and Glocker, Ch., "Nonlinear dynamics and modeling of various wooden toys with impact and friction", Journal of Vibration and Control, Vol. 9, pp. 25-78, 2003.
More engineering and physics-related video demonstrations can be found here:
video-demos.colostate.edu/
Subscribe to Dr. Dave's CZcams channel (and be sure to turn on bell notifications):
czcams.com/users/DrDaveBilliar...
Show your support to Dr. Dave for his work by clicking on the donation button near the bottom of this page:
billiards.colostate.edu/
Found one Goodwill and we love it! Nice to see how the physics works.
Thanks for the comment. I'm glad you like the vids.
Gravitational potential energy is the main source, but some energy is also put into the spring with the push down at the beginning.
DrDaveBilliards god damn your voice is so annoying
@@evanjessome2311 I bet what you said was sarcasm
wow, this is really cool and im super glad i found your page. i turn wood on a lathe and would love to try and make some of these simple entertaining toys. youtube needs more videos like this.
Amazing. Your creations are wonderful. I'm going to try make some of these for my kids.
Muito bom mesmo. parabens.
This can work without impact. It doesn't slide because the weight of the woodpecker creates a moment which locks it due to the friction, during the oscillation that force is removed and the sleeve can momentarily fall. There are a lot of similar mechanisms that use this locking method such as some wood working clamps, this is how they get coarse adjustment before tightening.
… but it wouldn’t be a Woodpecker without the impact. :)
FYI, I just add the URL of where it was purchased to the video description.
All the work you've done for the game of pool and somehow this is your most-watched video!
For some reason, my toy physics videos went viral in India a couple of years ago and got huge spikes in viewership. Too bad the Indian viewers didn't also like my pool videos. :(
@@DrDaveBilliards We do love them too.
@@youraveragegamer3256 Thanks. I only wish all your countrymen agreed. That would be a lot of views!
Extremely intriguing!
Que Materiales Se utiliza Para Este Proyecto ? Desde Colombia Saludos
Great idea! Thanks for posting it.
Hi
This woodpecker was purchased, but you should be able to find springs at a local Ace Hardware store, or online.
Thanks for vid...given me lots of ideas!
I am looking for the mechanism examples which one could used rubber band instead of spring. anybody help?
That's why I love SCIENCE. It's very entertaining.
Nice job
Those are awesome toys.
Dude, you're analyzing all the fun out of it!
"Fun" to an engineer isn't always fun for everybody else.
I can still hear the sound it makes!
Where can I get one ?
reliving the good old days DrDave? :D
This results in the shock force of the column with the beak of the bird, and in this case forcing it to force the parcel to the opposite direction (lower)
awesome.....thanks for sharing....
Amazing toys!
this is my first toy in my life thanks for vedio
Awesome.. cool recommendation
How to make this sir plz say
These toys are cool
Agreed.
Wow nice
My(then) 8 yo son saw one of those and scrounged up the stuff to make his own and it works.
Eu tinha um desses na minha infância! Muito legal!
A lot of planning and thought had to go into creating this toy for it to work as well as it does.
Sometimes these sorts of things are discovered by accident and then refined. I don't know the history of this particular toy.
After ten years, CZcams recommend this.
It must be a totally awesome video for CZcams to do this! :)
legend says the woodpecker still peckin the pole
awesome
good posting!
Thanks. Check out Parts 2 and 3 also if you haven't seen them yet.
Recomended after 9 years wtf haha
Interesting toys and cool physics do not have expiration dates.
*10
LOL i just realize it until u comment
Even for me
Это не предел)) 30 марта 2018 года -жесть)
Who is watching this in 2018?
Obviously, you and many others. The "super slow motion" footage is a little "dated," but the content is still relevant and interesting to people. Cool physics doesn't have an expiration date.
Very nice
This same sort of thing would work with a paper clip and a pencil. It doesn't work all the time, but every once in awhile I get it to work. I loved doing it when I was in second grade.
Wow its amazing ...
Watching it 10 years later
... nothing wrong with that. Cool physics doesn't have an expiration date.
DrDaveBilliards agreed sir...
Ashwajeet Kamble Me tooo !
The toys aren't "my creations," but they are fun and interesting. I hope your kids like them!
DrDaveBilliards you* :)
i need this how much??
Is that a purity ring?
I want this toy.
I'll see if I can get a video up of it. It's tough to explain lol.
New hype, I'm calling it now
What if you flip the toy, will it go up ?
I like you way you think, but that would make it a "perpetual motion" machine which is not physically possible. You cannot violate the law of conservation of energy.
Young man, this woodpecker will work even if the beak or bill doe not touch the pole. When happens when the bird is in the lower position it is held by friction as you so well described, and at that moment the spring is storing energy, so as the bird is raised by the action of the spring, there comes a time when the ring is separated from the pole and so it will fall. This falling will give momentum to the bird as a whole and since it has the additional throw of the spring energy it will come down faster than the ring till the ring till the near lower side and far upper side of the ring touch the pole and friction causes it to stop while the woodpecker proceed to swing storing energy in it.
The fast that the bill can touch the pole adds a non-linearity and it is not so easy to analyse, otherwise if the bill does not touch the pole is is fairly easy dynamic equation. I wish all these toys will be used to show the application do materials, science and mathematics and physics and material science. All schools will gain a lot if these automata dynamic toys are show at schools and presented as applied processes of what they learn in class.
Can u pla share link of any studies?.Case with linear equations.
Makes sense.
what do u mean... im intrested
This was my childhood toy
This is how much?
I saw the video and I said it to myself that this video has to be at least a decade old.
Good guess.
DrDaveBilliards 😂😉
I want it now......
that's cooooool
NICE (: The high-speed looked so meme worthy. XD
i like this design
We did this in shop class at School.
can you give me the pole dimension? please answer :)
Sorry for the late reply. I no longer have access to it, but you can easily judge the dimensions from the scale of things (e.g., fingers) in the video.
Nice way to go down
i clicked this bc of youtube algorithm but turns out it's just DrDave
Mitsuo Did you expect a woodpecker on a pole playing pool? :)
@@DrDaveBilliards haha maybe
i am working on it in my master's research in mechanical system
would you give me the data or the parameters such as length radius etc of the whole system until i put it in ADAMS
Sorry, but I no longer have access to it. Maybe the article cited in the video description can help.
@@DrDaveBilliards am sorry sir but I didn't find any if you have the email or any information of the professor which represents the video please tell me
@@aniskhammari8229 Sorry, but we no longer have the toy. The only info remaining is what is in the video description.
@@DrDaveBilliards thanks alot sir
inside the video I see Super slow motion with high speed video camera would u please send me the video on mail
@@aniskhammari8229 You can find tools online to download CZcams videos. I don't have the original footage anymore.
@NigelLoller
Agreed ... but then it wouldn't be a wood (or wire) "pecker" anymore. :)
Man, it's IMPOSSIBLE to find one of these in Brazil. x(
i'm lost to this bird.i'm out my mind.and i'm here to it.
Neat. And now to weaponize this....
Just put thousands of them in the battlefield to distract the opponents as they marvel at them. :)
But why friction dont just stop it in between
Friction does stop it, but the stored energy in the spring is enough to release it again, and gravity continues to replenish the energy in the spring.
That's common understanding.
I can say I played with this some 15 year back.😂
I'm proud of Indian education after watching his explaination
lol the woodpecker
ok tell me when u get it up!
I want one!
I played with this toy before 20 years.
Nice
I want one
Nice, did you make it?
Gabe Salgado No. I bought it, per the info in the video description above.
Bagus👍👍👍
Works like a load lock
now that You've perfectly explained this technological breakthrough maybe you can explain the meaning of life.
Tom Satterly The meaning of life is to live, love, and be loved. It’s pretty simple. :)
The meaning of life is to give life a meaning
I knew that your pool physics slow mo camera had to be put to other uses!
I used it for many things in the past. More examples not on CZcams can be found here:
high-speed-video.colostate.edu/
It moves down because vibrations
So like ummmm what was your channel called before you switched to making billiards videos?
I've always focused on billiards, but in the early years I also did some physics and engineering stuff.
@@DrDaveBilliards well pool is all about physics so i guess it suits you well! I once had an argument over whether pool was physics first geometry second or vice versa. Somebody that doesn't even play regularly thought it was geometry first. I had to explain to him you figure out the geometry after you figure out the physics needed to 1. Make your shot and 2. Get position. It took a physical demonstration before he understood.
Dr Dave where's the billiards?
... in pretty much all of my other videos. In the past, I also did engineering and physics videos.
Great
JAGAN
That's fine and all but how's Dr. Tom's pool game?
Nonexistent.
I have one of those woodpecker things 😂😂
Watching it 23 year later
... actually, it is only 10 years old, but I hope you will also watch it 13 years from now. Cool toy physics doesn't have an expiration date.
Explain to me,why Im here
Ayda _najiha you clicked the video
kerana awk sgt cantik😁😁
sebab jodoh kita HAHAHHAHAHHAHAGA
Rasydan Zulkefeli alaa kacau laa😂
Haha senanyer sye geng sajat😂😁
good
Is there an equation ??
There are lots of equations in the technical paper cited in the video description above.
DrDaveBilliards
I wish u make one in CZcams... thank u 😊😊
cool
thanks?
Wow... 👍
i have wood, a pecker, and a pole...can i do this?
nice i like😄😄😄😄😁😁😁👍👍👍👍👍
Wtf Facebook recommended me this video after ten years 2018 😂😂
Videos of toys with cool physics don't have expiration dates!
DrDaveBilliards yeah you are right 😊☺
I think its because of the vibration caused by the wood pecker
Good idea, but I don't think vibration is required to get the observed action.
sine wave all the way man!