Hi,
I'm revising for a mechanics exam by going through past papers.
One of the questions is about a wheel of radius R. It gives me the density P and asks for the mass M.
So P(r,θ) = ae^(-k(r^2)) which is in polar co-ordinates but I think I need to change it to cartesian so then I can use the equation M = ∫∫∫ P(x,y,z) dx dy dz.
It also gives that 0 ≤ θ ≤ 2π. This prob comes into it somehow.
Can anyone help?
Thanks
Amber