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4,571,006 Views ā¢ Nov 30, 2023 ā¢ Click to toggle off description
Thanks to Hugh Hunt for the idea for this video.
If you try to pass a bouncy ball under a table, if it hits the underside of the table it will just bounce back out the way it came.
Here's the golf ball paradox video: Ā Ā Ā ā¢Ā TheĀ GolfĀ BallĀ ParadoxĀ Ā
Here's the turntable paradox video: Ā Ā Ā ā¢Ā TheĀ TurntableĀ ParadoxĀ Ā
Here's my discord server: discord.gg/B6uNzAgshy
Here's Patrick's simulations: www.glowscript.org/#/user/Patrick_Dufour/folder/spā¦
Here's the video Eyy Tee sent me of the ball in a square box: Ā Ā Ā ā¢Ā SUPERĀ BALLĀ RETURNSĀ FROMĀ TUNNELĀ Ā
You can buy my books here:
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Views : 4,571,006
Genre: Science & Technology
Date of upload: Nov 30, 2023 ^^
Rating : 4.955 (851/75,597 LTDR)
RYD date created : 2024-05-14T16:17:01.650161Z
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YouTube Comments - 2,488 Comments
Top Comments of this video!! :3
Now explain why the childrenās bouncy ball always gets stuck under the sofa and never bounces out.
11K |
Thatās also related to the āimpossibleā shots in snooker and other billiard games. When cue ball suddenly reverses its direction due to the spin gripping the cloth or cushion.
1.3K |
my procrastination game is strong today.
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Before getting caught up in the many-sides version, I think it's important to mention that part of the reason it's hard to bounce a ball under a table is that the rotation robs some of the horizontal velocity, making the ball hit the underside of the table much earlier than you think it should. You have to bounce the ball considerably farther away than half way under the table for it to come out the other side.
968 |
"Low-poly cylinder" is my new favorite name for convex regular polygons.
You brought up friction at the collisions, but I kept wondering if you were going to address deformation of the ball at each bounce. My initial thought is that the ball deforming when it hits a surface mostly just increases the surface area for friction to be applied, but I don't know enough about bouncy ball physics to decide if it is a crucial part of the dynamics or not.
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I love how well you keyed out your hand on that slo-mo shot, what an editor!
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I play racquetball, which is basically a bouncy ball in a cube like this. I remember when I was first learning, the ball kept bouncing off surfaces in ways that seemed more extreme and counter intuitive. It's second nature now, but this video was great at explaining what my brain had trouble with all those years ago!
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Incredible video! I remember the golf ball video ages ago. While your communication skills really carry your conveyance of fairly complex ideas in an intuitive and digestible manner, this video was the key to understanding that video fully. Once I "got" this video, it instantly allowed me to understand your previous. Excellent work, as always! :)
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Steve, you are one of the best science communicators I've ever seen. So glad that you make these videos. Your kindness and endless curiosity are greatly appreciated.
826 |
I like that you use props like a book and a box - it shows people that they can explore physics with the stuff they've already got in their house
378 |
This is so simple and logical, but I never even stopped to consider this might be happening when you throw a ball to bounce on several surfaces. Would be nice to see a similar experiment with a gyro-type of bouncy ball that tries to eliminate this change in spin
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Now explain why my wife left me
565 |
I bet if you did this demonstration with a ball covered in different coloured spots you'd get a nice visual indication of the change in rotational axis after each collision. The various spots would move more or less depending on how close to the axis they are and after a bounce a different spot would stop moving
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I just want to say, that shot where you show the ball spinning and floating slowly through the air was absolutely brilliant. I still have no idea how you pulled it off.
I sat here for nearly 3 minutes (maybe like 2 minutes and 46 seconds?) trying to wrap my brain around it and couldn't figure it out! Bravo.
931 |
its pretty amazing how much you can learn from watching things in slow motion. like you can say it to me and explain it super well but showing it to me in slow motion I actually can rap my head around the ball rotation and the effects that has on each bounce. played quite a bit of 8-ball in my day and I think that was my biggest hurdle was the massive difference in friction
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Steve, I so appreciate how you can break something down to make it intuitive! Thank you for the service you provide, which is entertaining, while making something really cool makes sense to people :)
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Table Tennis, once you are past the "basement" level, is almost entirely built around this phenomonen. You can pretty easily learn how to bounce a table tennis ball back over the net using the spin alone. the idea that the collision changes the spin is essential to master. super cool video! i bet you could expand this by like filming the spin of a ping pong ball between highly skilled players
322 |
Thanks for the awesome content!
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I appreciate how much info you added that isn't just answering the prompt of the title.
Also taking a limit as teh number of side approaches infinity is a cleaver way to figure out the relation between the under table bounce and the golf ball paradox.
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@SteveMould
5 months ago
Does it make more sense now? Maybe. idk The sponsor is Incogni: The first 100 people to use code SCIENCE at the link below will get 60% off: incogni.com/science
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