Recent content by Smooth23

Thanks, I realize it didn't make a difference in that particular problem. Another old test had a similar problem where it did make a difference, but was apparently labeled correctly that was really confusing the crap out of me.

Okay, I'm studying for a test, looking at former solutions here: http://campus.mst.edu/physics/courses/24/Old_exams/e3_spring2012_solved.pdf number 7 has me confused for line segments 1 and 2 why is r-hat in the given direction?

Okay, the biggest problem I'm still having 12 weeks into physics 2 is that I cannot for the life of me see how the direction of r-hat is determined. Can anyone explain it to me? Specifically in regards to Biot-Savart law, etc.

I don't see why we can't treat the disc as a point mass, seeing as the problem says nothing about it actually rotating, and is attached at it's center mass, PAT should be valid.

My thought is to use the parallel axis theorem, treating the weight at the end of the rod as a point mass. Itotal=1/3ML^2+m(D)^2 Irod(about its end)=1/3ML^2 where M is the mass of the rod, m the mass of the weight, and D the distance from center of mass of the rod to the end of the rod I=...