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Jacobs Physics

@jacobsphysics.bsky.social
467 followers 75 following 2.4K posts

Physics program consultant; sports broadcaster; umpire. (Edna fan art by @aldescery) Official blog: jacobsphysics.org

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Reposted by Jacobs Physics
W. Brian Lane (he/him), PhD @wbrianlane.bsky.social · 01/10/2026
Today's advice 🎢
If you can't name the source don't draw the force
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Jacobs Physics @jacobsphysics.bsky.social · 24/09/2026
#iTeachPhysics
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Jacobs Physics @jacobsphysics.bsky.social · 18/09/2026
I suspect that would work quite well. How is it going in practice? Is the quiz having the effect you expected?
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Jacobs Physics @jacobsphysics.bsky.social · 17/09/2026
How do I reduce over-reliance on friends, tutors, or LLMs in my AP Physics 1 class? I give targeted daily quizzes based on problem sets. Here's one example with free-fall kinematics. #iTeachPhysics jacobsphysics.org/2026/09/16/t...
jacobsphysics.org
The Kinematics Window Problem, and a Daily Quiz to Check Understanding
I’ve assigned the problem below for many decades now. I *think* this came from an old Giancoli text. A falling stone takes 0.30 s to travel past a window 2.2 m tall, as shown above. Calculate…
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Marco @malmeida.bsky.social · 13/09/2026
Conservation of Momentum problem for #ITeachPhysics
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Jacobs Physics @jacobsphysics.bsky.social · 11/09/2026
I'll be running a couple of one-day AP Physics 1 workshops this autumn! Oct 3 and Dec 12. See the post below for what I'm planning for the day! jacobsphysics.org/2026/09/11/c...
jacobsphysics.org
College Board is bringing back one-day AP Physics workshops – online!
School has started here in central Virginia, and I’m up to my eyeballs in convincing students to read and use their fact sheets. Plus broadcasting soccer and football games via internet audio…
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Jacobs Physics @jacobsphysics.bsky.social · 09/09/2026
On point 2, by having conference-affiliated refs for out of conference games, you’re perceived not to be fair even if you’re scrupulously fair. Gotta use refs who don’t seem to have a conflict due to their employer.
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Jacobs Physics @jacobsphysics.bsky.social · 09/09/2026
Oh… been offline for a few days. Big ten says they had a camera/timer that wasn’t available in the broadcast. Probably true. Two major issues here: 1 my regular rant about replay being used to split hairs, especially at end of games. Sucks the soul out of sports. 2 why is big ten hiring the refs?
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Jacobs Physics @jacobsphysics.bsky.social · 06/09/2026
Lindsay at Closecallsports is my resource nowadays. She was not thrilled with Eddings’ decisions. (As for call at plate, she did not address, but I say “don’t be out of challenges.”). youtu.be/gypvSjf6E1M?...
youtu.be
E115 - Doug Eddings Tells Hancel Rincon to Fix His Hat Straight & Oliver Marmol Gets Ejected
YouTube video by CloseCallSports
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Matt is Just Trying His Best @thegrampus.bsky.social · 02/09/2026
Whoever decided to promote Coyote vs Acme by letting Wile E do an AMA using only signs deserves all the praise.
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Jacobs Physics @jacobsphysics.bsky.social · 03/09/2026
Amazing! This looks like my nightmares from graduate advanced 2d differential equations. 😊
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Jacobs Physics @jacobsphysics.bsky.social · 02/09/2026
My ex-nun mother was a HUGE fan of Father Murphy.
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Randall Munroe @xkcd.com · 02/09/2026
Trade xkcd.com/3290/
Comic. [Person standing holding hammer above raised knee.] PERSON: Listen up, leg. I’ve been sending you rich, oxygenated blood for years, while you send me worthless used-up blood with no oxygen. Time to teach you a lesson about not ripping me off! [caption] Tariffs
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ArtButMakeItSports @artbutmakeitsports.bsky.social · 29/08/2026
The Garden of Earthly Delights (detail), by Hieronymus Bosch, 1480-1505
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Jacobs Physics @jacobsphysics.bsky.social · 26/08/2026
When we say “Maybe it will happen today,” this is not what we mean.
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Vincent Verhei @vincentverhei.bsky.social · 24/08/2026
This seems like a good time to remind everyone that the Browns just started building a new stadium with over $800 million in public money.
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Jacobs Physics @jacobsphysics.bsky.social · 24/08/2026
What? Grump and Surl are the Statler and Waldorf of faculty meetings, right? I can deal with first day of classes if I can survive the meetings first. (Those start today for us. And they look to be perhaps productive. We shall see. 🤷‍♂️)
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Jacobs Physics @jacobsphysics.bsky.social · 24/08/2026
Guards Guards.
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Jacobs Physics @jacobsphysics.bsky.social · 24/08/2026
Is 1 most or least intimidating?
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Of all the Ion ads tonight, the one that makes the least sense is our local Tr*mpist congressman advertising during women's soccer. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Only one minute of stoppage time?!? Wow, I'll take that... but this one minute is lasting as long as a minute in a deep gravitational well. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Nor do I want to see a promo graphic obscuring game action. Grrrr. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
I think that second roar from the crowd was when the replay of the Sonis-on-Hanks violence showed in Providence Park. But ball don't lie... Denver's shot ended up on a Multnomah Athletic Club stairmaster. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Hey, Ion? I bought a bloody enormous television for a reason. I don't want 1/4 to 3/4 of the screen taken up by ads during game action. That was not the reason for the biggity. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Does anyone else remember Tom and Jerry playing tennis, and Tom yanked the lines on the court so that Jerry's shot would be out? Sophia Wilson's reaction suggested that Tom might have yanked the post out of place. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Denver getting too much attacking joy lately. Nerves a jangling. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Effects on my blood pressure: Sophia Wilson on the ball, alone at midfield: Portland's Japanese Gardens. Fleming trips at midfield resulting in a 4 on 3 counterattack: Washington DC rush hour traffic without express lanes. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Ion could use some new commercials - lotta repeats. Good news is, the Carmax ads are solid even if they're on again and again and again. And I irrationally love the "I need a zevo!" bug zapper commercial, perhaps because I possibly need a zevo. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Wilson-Tordin should be a buddy cop combo, a gubernatorial ticket, roommates in a sitcom... #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
No, commentators, it's not "savvy" for a keeper to prevent a ball to go out for a corner, whether or not Portland is good at set pieces. It's "playing soccer". Oh, now we're being told how important set pieces will be tonight! Drink! #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
Not *just* the Thorns, but all teams in all sports nowadays: Can we please provide a one-page, text-only numerical roster that can be found easily with a simple online search or one click from the team homepage? #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 23/08/2026
That ball was too far for Sophia Wilson to chase. Didn't know that was possible. :-) #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 21/08/2026
60 million is quite cheap by today's standards. :-)
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Jacobs Physics @jacobsphysics.bsky.social · 21/08/2026
On one hand, I finally found a streaming package that allows me to watch USA network without also paying for ISIS propaganda (i.e. F*x News). Yay. Pure sports package on Direct. On the other hand, holy effing crap at the price. Don't think I can keep it past the promotion. We'll see.
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The Short Fuse @theshortfuse.bsky.social · 21/08/2026
We go again. This time as Champions. COYG.
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Jacobs Physics @jacobsphysics.bsky.social · 20/08/2026
I think anyone today discussing or criticizing "the left" should be ignored, like a soccer player writing on the ground holding his face when in fact whatever contact he may have experienced was to his shoulder.
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Steuard Jensen @steuard.bsky.social · 19/08/2026
I'm going to share this with all my students! 🎢 Horizontal axis=student homework average, vertical=exam average (both scaled so 100=avg among non-AI students). The relationship is linear for students not using AI. AI can get higher HW scores, but you don't learn. papers.ssrn.com/sol3/papers....
papers.ssrn.com
The Generative AI Learning Penalty: Evidence from Chinese Secondary Education
Using 30 months of panel data on 26,811 Chinese students in grades 7-12, we study how generative AI affects homework productivity and learning. The data combine
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Greg Pak @gregpak.net · 18/08/2026
Suggestion: never concede that "A.i." writing is "polished" because it might be grammatical. "Polish" isn't about grammar. It's about ensuring that each sentence and word plays an essential role in forming a coherent argument or effect. The repetitive blandness of "A.i." writing has zero polish.
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Jacobs Physics @jacobsphysics.bsky.social · 18/08/2026
On all other nights, we leave the field upright, but on this night, we leave the field reclining...
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Jacobs Physics @jacobsphysics.bsky.social · 18/08/2026
If I remember my Bengals lore correctly... under Wyche, receivers earned $100 for every block that put a defender on his tuckus. The 15y penalty that sustained a drive against Buffalo in the 88 NFC championship was because a Bills CB had had enough.
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Jacobs Physics @jacobsphysics.bsky.social · 17/08/2026
Did I say anything about "quality?" 🙃
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Jacobs Physics @jacobsphysics.bsky.social · 17/08/2026
Every day is white button-down shirt, black trousers, and a random tie from the rack. Easy to do in the dark. Stinks to be wearing a tie every day, but the lack of fashion choice is, to me, a small benefit. :-)
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Melina Melinae @melinae07.bsky.social · 16/08/2026
I'm not crying, you are. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 16/08/2026
Hee hee. Studio is so much easier than live commentary! And so much harder to eff up! Even Lori Lindsey was good in studio!
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Jacobs Physics @jacobsphysics.bsky.social · 16/08/2026
Did you see Moultrie and Hanks embracing right after full time? Rooting for both of them...
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Jacobs Physics @jacobsphysics.bsky.social · 16/08/2026
For reference, the Ion studio folks have interesting and intelligent things to say. They didn't miss the Hanks/Moultrie comparison. They talked eloquently about Hanks's journey. And they didn't talk over game action, of course. <eye roll> #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 16/08/2026
The broadcast wouldn't shut up about Hanks's rehab before and after the goal. But they missed the story, when Moultrie and Hanks had a long embrace and conversation. One woman at the end of the recovery journey, one at the beginning. Hope Moultrie's return is as sweet. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 16/08/2026
One of those nights when I'm glad I stayed up past my bedtime to watch the Thorns. What a night. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 16/08/2026
OMG. I mean, I don't generally type "OMG," but if that goal by Hanks doesn't deserve an OMG, I don't know what does. #BAONPDX
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Jacobs Physics @jacobsphysics.bsky.social · 16/08/2026
I mean, you're not at all wrong! I'm just thinking that if Arlo White or Claire Thomas were on the call with intelligent and savvy analysts, people would figure out the streaming service, the same way people figure out where Taylor Swift is performing. <shrug>
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