Youtube videos

[preoccupied]

A good video on levers.
https://www.youtube.com/watch?v=kY2YeM5fNDw

Steve Mould is trying to create a double decker Newtons craddle. The ball moves up on the lever and around its curve and loses energy. You can minimize the change in lever and ball connection by using additional levers called poking levers, I guess. The ball to the lever needs a longest lever to minimize the positioning. Then on back on the balls on the bottom he would need a shorter lever which I emphasize with this drawing. I have only thought about this a little but I think I'm right but I might need to adjust the pivot on the poking lever. I have it in the center but it might minimize change better if the pivot is closer to the ball on the long poking lever and but the connection from the smaller poking lever connected to the ball on the bottom might need the poking levers pivot to be close to the, well I'm not sure so I think the main point of the bottom part is for the lever to be smaller that pushes the poking lever. I guess it could work better on the bottom if the pivot point on the poking lever is closer to the ball and the lever moving the poking lever is smaller. If the total change in impact locations is minimized I think that it might work like a double decker Newton's cradle for a long time with minimal changes in motion like they like on the desks of CEO's office desks. It would last longer as a double decker Newton's cradle if they used some kind of poking levers, I think.

[preoccupied]

I think that a long poking lever and a long lever doing the exchange will limit the change in contact area and prevent the levers from wobbling and the impact will more directly transfer to the next row on the bottom. I mean to say if enough change in contact points is reduced the lever might not wobble any and the energy might directly transfer to the next row under it as if the balls were right next to each other. This might create a more perfect double decker Newton's cradle.

[thx4]

Gravity seen over time.
https://youtube.com/shorts/zJkzbt2GcjQ? ... xulnrKUUWT

[Gregory]

Veritasium came out with the second part of the Action / Mechanics of the universe video:
https://www.youtube.com/watch?v=qJZ1Ez28C-A

[Gregory]

How colliding blocks can compute Pi...
I found these vids as entertaining curiosity:
https://www.youtube.com/watch?v=vlUTlbZT4ig
https://www.youtube.com/watch?v=6dTyOl1fmDo

[Tarsier79]

https://www.youtube.com/watch?v=Pw3AvKcHeTw

So can we use sand to increase PE?

[Fletcher]

Thanks for that vid - I had not come across the term dilatancy before, but I had wondered about sand drying around my foot when walking on a wet beach - now I know why .. makes liquefaction more understandable too ..

[thx4]

https://youtu.be/JmhDiU9zFmw?si=nNdXR1ryEn2qSjxZ

[johannesbender]

https://youtu.be/9m0qG31QVpM