The other day I read a short, simple proof of the fact that there's no force on a mass inside a uniform shell of matter (and a similar statement applies in electrostatics). This problem is usually done in an elementary class by setting up an integral. However, this simple proof is accessible to a high school student, as it just uses simple geometry and a little trig. I wrote up a blurb on it, as it also has some interesting electrical history.
It also turns out it was a problem in my basic physics text (Resnick & Halliday) when I was in school, had I bothered to read it.
It also turns out it was a problem in my basic physics text (Resnick & Halliday) when I was in school, had I bothered to read it.
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