The Ups and Downs of Interpreting Graphs

Here’s a graph showing some guy’s position as he’s out for a walk:

This graph shows the position of a guy out for a walk. Can you tell what he's doing?

This graph shows the position of some guy out for a walk. Can you tell what he’s doing?

Take a moment and describe in your own words what he’s doing.…

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Using Harlem Shake to Teach Physics

I’m not going to pretend that I remember enough about my high school physics to speak intelligently about the difference between  centrifugal and centripetal forces, but I do know a good piece of teachable media when I see it. When you introduce a brick to a front-loading washing machine spinning at several hundred RPMs, you get something both destructive and magical.…

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