Question

Find the moment of inertia of a uniform ring of radius r and mass M about a tangent

Answer 1

axis like this?

Answer 2

Yes. I'd use the parallel axis theorem for this one. First first principles is a bit of a pain.

Answer 3

the parallel axis theorem is use gyration right?

Answer 4

\[I _{G}\] i have to memorised it?

Answer 5

No. Look it up.

Answer 6

E.g., http://academicearth.org/lectures/rotations-part-ii-parallel-axis-theorem