Author Archives: Andy Rundquist

About Andy Rundquist

Professor of physics at Hamline University in St. Paul, MN

Computational Data Science capstone class

In just over a week the CDS capstone class starts and I’m not nearly ready. It’s been a while since I taught a class (Spring 2021 in the pandemic) and I’m a little rusty. But I remembered how useful it … Continue reading

Posted in computational data science, sbar, sbg, syllabus creation, teaching | 2 Comments

Rolling without slipping on curved surfaces

I’ve been trying to see if I can model balls rolling on curved surfaces and I think I’ve cracked it. Here’s a teaser to get you interested: What you see is a sphere rolling on a curved surface. The blue … Continue reading

Posted in fun, general physics, mathematica, physics | Leave a comment

Situations that share equations of motion

Recently my friend Rhett Allain has been making some awesome videos showing how to solve complex problems with a Lagrangian approach. I love it when he posts a new video because it usually motivates me to try to model something … Continue reading

Posted in mathematica, physics | 3 Comments

Rigid bodies, formulation and examples

My friend Rhett Allain gave me a good challenge recently with this tweet: I had been working on a problem that he posted about regarding a bead sliding freely on a hoop that is spinning about an axis in its … Continue reading

Posted in mathematica, physics, syllabus creation, teaching, twitter | 1 Comment

Creating bike routes with python

This weekend my goal was to ride 50 miles to and from my house. In my last post I showed four ways to find where I could get to for a certain distance, but I really hate “there and back” … Continue reading

Posted in fun, math, programming, technology | Leave a comment

Gabriel’s Horn (guest post)

Last week I was intrigued by this post: I asked, on Facebook, whether filling it with paint would essentially be painting it on the inside and I had a suspicion that my good friend Art Guetter (Professor of Mathematics at … Continue reading

Posted in guest post, math | 1 Comment

What’s my 30 mile cycle limit?

UPDATED WITH 4th APPROXIMATION! Last weekend I went hammock camping by towing all my gear behind my bike. I loved it and now I’m interested in finding other adventures that won’t tax me too much. I really think that, for … Continue reading

Posted in fun, math, mathematica, technology | 6 Comments

Classroom photo sharing app

For a long time I’ve wanted an app that could Allow my students to take a picture of their work and share it with the class Certainly my computer should be able to display it, but with thumbnails for all … Continue reading

Posted in Google Apps Script, syllabus creation, teaching, technology | Tagged | Leave a comment

Audience ranking questions

I’m helping to run a workshop this week and we realized that instead of using post-it notes through the day to capture “burning questions” we could use a tool that both collects questions and allows the audience to vote on … Continue reading

Posted in Google Apps Script, syllabus creation | Tagged | 2 Comments

Brachistochrone for rolling things

The Brachistochrone curve is the shape of a wire for beads to slide down (friction free) to get from point A to point B the fastest. Note that since I used the word “down” there I’m implying this happens in … Continue reading

Posted in math, mathematica, physics, teaching | 3 Comments