I like baseball's ABS system. Over time, the "gotcha" factor will wear off and we won't think of it as something that makes umpires look bad. (They do get most of the calls right.) But now it's kind of a group effort: ump, pitcher, batter, catcher work together to land on the right result.
If they wave their hands and say something something best practices you are supposed to cave.
Did you try to open your car with it?
Near the end of the series, he comes back around to the mathematician answer: vectors are anything subject to well behaved addition and multiplication by a scalar. It’s fascinating but also no reason to start there with beginner physics students.
The first video in 3blue1brown’s “Essence of Linear Algebra” series has a very helpful discussion of different ways to answer “what is a vector?” (The series as a whole is incredibly enlightening. ). www.youtube.com/watch?v=fNk_...
Oh well...
Oooh, i have considered this! Also opening day, a day when there is so much to do and the keynote goes on and on...
Lost power in the blizzard last night. So everything was really still and calm. You can have quiet realizations like: oh, that sound in my ears is actually tinnitus
I’m x^2 + 6x, you’re 9…
Silly SAT hack: say you have two points and you need the equation of the line. You know how to do it and you COULD do it but you feel lazy...maybe the #s are a little ugly...so you go to Desmos, put the coordinates in a table and then hit the regression button... #Iteachmath
Glad to hear that I am once again out ahead of the curve. I was also an early adopter on grade deflation. Not as a teacher, but definitely as an undergrad.
Laws of physics still working. And I will never not be entertained by this one. (Sound on!) Note which washers leave the stick. They are placed at 10 cm intervals. #Iteachphysics
My plan to fix tanking in nfl, nba: a roll of die AFTER the season determines n, the number of end-of-season games that don’t count toward record for draft order. (NBA would roll 2 dice). Then, first tiebreaker: team with BETTER record in those n games. I bet Giants and Raiders might play to win…
Wait, we’re counting the download folder?!
For physics, there is no single piece of equipment I would find more valuable than a single copy of the Interactive Physics software.
How much time is lost to disputes over creative differences? I think in real life, the answer might be infinity. Or n + 7 where n is how long it takes for them to stop working together and you get two snowmen.
Here’s a list no one needs to see: top ten things my dogs are excited to find while out in a walk…
…yeah, let’s let this go.
I have a 1 kg tungsten cube. I tell my students that it is the official kilogram from Paris and that when they adopted the new official kilogram, this one was no longer needed. They put it on EBay and I was able to snag it. (It would seem that telling such nonsense is a perk of the job. )
On the old place, PEMDAS was the first word I blocked. And yes, if there is a way to say ambiguous things, the answer is not to argue (endlessly) about those statements when we could choose to make clear statements instead. This is also true in mathematics.
iykyk...
Yeah, this is appalling so many ways. But I hadn’t even considered the (likely?) possibility that my letters are now being used to train their AI. Can they do that without my consent , I wonder (as if I’ve been living under a rock)?
This is an amazing update to what was already superb!!! (And I will be studying it to try to learn how you did it! I tried and failed to add some of these enhancements on my own)
I wondered for a moment what work you were sending to the space station…Mr Aura indeed
I can’t disagree: we did this problem today!
Also, can I add that it is easy to write projectile problems that are way too hard, with challenging math but maybe not much more in physics understanding to be had.
I hope I don't "enforce" it either :) These are all style preferences, perhaps more useful for beginner problems. Still, I'd be curious to see an example of the kind of problem you are thinking of where the method is too constraining.
But I think I may see where you are coming from. Are you of the no-substitutions-until-all-algebra-is-finished school? If so, you are probably in the majority. I admit I am lax about that. So my students get away with solving for t and then substituting. That may be how we evade this issue
Well, okay. But the point is not to make doctrine but to encourage disciplined examination of each item. So given a launch speed of say 20 m/s at 30 degrees, I can ask: is that horizontal? No. Vertical? Still no. But it has components…
I make a chart that keeps horizontal and vertical separate but make a big deal that when either side of the chart hands you enough info to solve for time, you can “send that to the other side”. Is that what you are asking about?
We are not afraid!
