Category Archives: physics

Faraday’s law is overused

First let me say that I thought for sure I’d written this post last year, but it appears not. That could also mean that maybe I didn’t write it because someone else had a good breakdown of my argument, but … Continue reading

Posted in electromagnetism, general physics, physics | 6 Comments

Circuits: find out now or leave it hanging?

I had a really fun class today. It was a review day, like every Friday, and I started out with a pretty innocuous clicker question (though I don’t use clickers). Go ahead, give it a try. The correct answer changes … Continue reading

Posted in physics, teaching | 4 Comments

Rugby ball bouncing

A friend of mine was telling me that when you play rugby, you can count on the ball bouncing up nice and high for you every third bounce. He showed me in the gym how that’s basically true and I’ve … Continue reading

Posted in mathematica, physics | 1 Comment

How to drill a well

In one of my courses this semester students were learning about the coriolis and centrifugal forces that things seem to experience on the earth. There’s a problem at the back of the chapter that asks when a dropped rock would … Continue reading

Posted in mathematica, physics, teaching | 7 Comments

Double pendulum roller coaster FIXED

My last post was wrong. I’m to blame. But in thinking about it and talking about it with with lots of helpful friends I ended up learning a ton. Here’s the upshot: There were kinks in the roller coaster loop … Continue reading

Posted in mathematica, physics | 7 Comments

Double pendulum roller coaster

EDIT: SEE THE NEXT POST THAT FIXES A MAJOR MISTAKE IN THIS ONE I’ve been doing a lot of modeling of beads on wires lately, but today I discovered something that really surprised me. The surprise came when I found … Continue reading

Posted in mathematica, physics | 8 Comments

Lagrange multipliers revisited

I spent the last few days trying to decide whether to teach Lagrange multipliers in my Theoretical Mechanics course. Ultimately I decided to go ahead and do it and I wanted to get down my thoughts on why and what … Continue reading

Posted in mathematica, physics, syllabus creation, teaching | Leave a comment