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Shackleford
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We pretty much do derivations maybe 80% of the time in my Intermediate Mechanics class. I'm having a bit of trouble seeing the various infinitesimal areas or volumes when incorporating that into an infinitesimal mass and density equation in our gravitational chapter we're in right now. Is there a website or something that walks through the derivation of infinitesimal area/volume for a spherical shell, sphere, etc.? I was able to fully understand the gravitational force from a spherical shell with areal density and so forth. The professor said this is a very important derivation.