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lephysichien.bsky.social
@lephysichien.bsky.social
Astrophysicist, interested in sport science, baseball, hockey, Crossfit and chess among other things. https://www.laphysiquedubaseball.ca/
Any good ones missing from my collection?
June 12, 2025 at 1:15 AM
I already have the t-shirt!
June 7, 2025 at 2:57 AM
Bon, je vois que le gif animé ne fonctionne pas. Revoici les 2 images
April 4, 2025 at 3:25 PM
Dans ce cas extrême, on remarque que les noeuds des trois premiers modes de vibtation bouge légèrement vers la gauche. Lorsqu'on est dans cette région (le ''sweet spot''), l'énergie de vibration est minimale et donc la vitesse de la balle sera maximale.
April 4, 2025 at 3:24 PM
And here is a video that @themagnuspi.bsky.social shared on the other site a few years ago...clearly the orientation changes. If you pay attention to replays, you see this happening quite often (I stopped counting)
December 7, 2024 at 11:13 PM
Here is a simple experiement anyone can do. If you spin the ball fast enough, it will alway end up spinnin on the seam. The spin axis is still pointint upward, but the orientation has changed. I have seen hundreds of MLB replays where the ball does that midflight...
December 7, 2024 at 11:04 PM
November 24, 2024 at 2:45 PM
Yeah, only colored arrow, nothing I can use. I had made some quick calculation some times ago for a prototypical sinker. I found that pitch with 17.9 inch of run (SSW included) goes down to 16.5 when a constant 5 mph wind blowing in is included. I don't know what are realistic velocity values...
November 15, 2024 at 2:10 PM
November 12, 2024 at 9:02 PM