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Category Archives: physics
Does the hoop hop?
I greatly enjoyed this recent video from StandUpMaths: The set up is a hoop with a mass attached at one point. It’s rough so it rolls without slipping. It’s released with some angular momentum with the extra mass starting at … Continue reading
Posted in general physics, math, mathematica, physics
1 Comment
Planetary tunnel oscillators
Pick a point on the earth and start digging. It doesn’t have to be straight down. Keep it straight (careful! it’s harder than you might think) and keep going until you come back to the surface. Ok, now drop a … Continue reading
Posted in general physics, mathematica, physics, teaching
2 Comments
Dropping ladders
My friend Rhett Allain has really got me interested in this ladder drop posted by Veritasium: Here’s Rhett’s awesome explanation: Of course I wanted to see if I could model it with Mathematica, and, after finding I could run Mathematica … Continue reading
Posted in general physics, mathematica, physics, 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
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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
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
Catenary with Lagrange Multipliers
The catenary is the shape of a hanging chain supported at both ends in a constant gravitational field (ie normal life). Recently Rhett Allain has been doing some great work using both python and analytical results to show how you … Continue reading
Posted in mathematica, physics
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Physics Teachers Are Awesome
I’ve started a project that brings me joy. I’m hoping to help spread that around! I was looking around for ways that I could support physics teachers who were working so hard to teach during this pandemic. I was reflecting … Continue reading
Boltzmann to Blackbody to Electoral College
Ok, I know that’s a weird title, but bear with me, this has some fun stuff in it, including some things I still need help with. The basic idea is that Planck’s solution to Blackbody radiation is an interesting way … Continue reading