Recent content by cvbrewer

"Instant" is exactly what I told the students. I guess the question that I am really asking, then, is how long is an instant? :)

I am teaching mechanical energy, that is, gravitational potential and kinetic energy, to middle schoolers. Of course, we have been talking about things like juggler’s pins, roller coasters, and snowboard half-pipes. During this, the kids and I came up with a perplexing question. When you...