Along the paper faster than the paper
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Uploaded by coolaun on Nov 26, 2008
A very simple model that demonstrates the principle used by a Direct Down Wind Faster Than The Wind cart. Instead of wind, I'm using a moving strip of paper to propel the machine. The cart itself is just an empty cotton reel.
You can make one of these in a few minutes.
- 125 likes, 4 dislikes
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Uploader Comments (coolaun)
Top Comments
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You should narrate audio books.
Nice demo.
3 years ago 41
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OMG your voice is awesome!!! Sooooo.... Soooothing. Keep making videos i love your voice
3 years ago 35
Video Responses
All Comments (60)
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Such a brilliant voice, I'm subscribing to you in the hopes that you'll come back fromy our 2 year hiatus.
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so soothing ^-^
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Oh oh, I get it! The middle of the wooden wheel is smaller than the outer edges, so when the paper strip moves the wheel, it makes it turn more times per inch of the paper. Wow. You are incredible with your constructivist teaching magic. I must have more!!!
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@SteBrazier2K9 I just fell in a state of trance when he said "Underneath"
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I feel like the paper is curved, so the curve pushes the spool forward, instead of the friction between the spool and the paper pulling it. Maybe a straight, metal/wooden slat would help...
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0:53 onwards - most relaxing
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@Jezuzac if i am correct, that was explained a year ago. You didn't need to clarify.
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Please make more demonstrations!
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BE MY PHYSICS TEACHER
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I agree beautiful voice - You should record a guided meditation story over soothing music it would be a bestseller. I love the monkey where can I get one?
Rose
Smiles x
rosessmiles 2 years ago 15
Terry isn't a monkey: he's an ape (he's very particular about that!). He came from Ty Beanie babies: I don't think they sell him any more, but you're sure to find him on eBay. Look for Schweetheart the Orangutan.
coolaun 2 years ago 10
Can someone please explain this to me? I don't understand why the spool doesn't move the opposite way. When the paper pulls on it from the bottom, should that not make it turn away from the pull of the paper?
PHANTOM61994 3 years ago
Phantom61994, you can think of a rolling wheel as rotating, not around it's centre, but around its lowest point. The lowest point, touching the ground, has no forward velocity. If you push (or pull) at a point above this, it's like pushing on a lever. Depending on where you push on the lever, you can make the wheel roll faster or slower, but it will always roll in the direction you are pushing. Do some experiments yourself with rolling wheels and read through the other comments on this video.
coolaun 3 years ago 5