Recent content by jsmith12

Two identical dumb-bells are placed so that their ends are at (−d, +2l), (−d, 0), and (+d, 0), (+d,−2l). Each can be considered as two point masses m joined by a weightless rod of length 2l. Initially they are not rotating, and move with velocities (+V,0), (-V,0) so that the top of one hits the...

Ok thanks. But if I'm trying to work this out for the matrix 2 -1 -1 -1 2 -1 -1 -1 2 which has eigenvalues 0, 3, 3. The 0 eigenvalue gives (1,1,1) so that's the direction of no flow, but with eigenvalue 3 you can get lots of different eigenvectors so is the flow greatest in all of those...

If I'm given the components of an electrical conductivity tensor, how can I work out the directions in which the current is biggest and the directions in which no current flows?

That's what I get. But why does the question ask for the tension at a distance y? Surely the tension is the same everywhere? Or have I gone wrong somewhere?