Day 24: Really great class

My honors physics class had a great discussion today over Matt Greenwolfe’s excellent sliding box activity. We were discussing exactly what happens when you are pushing the box at constant velocity along the floor, and then you suddenly reduce your force in half.

The discussion took deep into understanding the nature of the fractional force, the difference between kinetic and static friction, and that kinetic friction doesn’t depend on velocity.

It’s one of the best class discussions I’ve witnessed in my own teaching, and I left wondering exactly what I can do to help students hang on to not just the big takeaways, but the thoughtful arguments that led to them.


About John Burk

The ramblings of a physics teacher.
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