- #1

vwishndaetr

- 87

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Given: A wheel of radius R rotates with angular velocity Ct

^{2}k[tex]\hat{}[/tex] (lies in x-y plane, rotating about z). A point P on the circles is P(x,y,z) = (0,R,0)

Ques: What is the position vector of point P in spherical coordinates?

Ans: Now I know that P(x,y,z) -> P(r,[tex]\theta[/tex],[tex]\phi[/tex],) = (R, [tex]\pi/2[/tex],[tex]\pi/2[/tex])

I want to say P(r,[tex]\theta[/tex],[tex]\phi[/tex],) = R [tex]\hat{r}[/tex] + [tex]\{pi/2}[/tex][tex]\hat{\theta}[/tex] + [tex]\{pi/2}[/tex][tex]\hat{\phi}[/tex], but that tells me P never moves. Considering P is on a spinning disk, it must some how correlate to Ct

^{2}[tex]\hat{k}[/tex]

Maybe I'm just overlooking this. Can some one point me in the right direction?