Answer:
Upper disk rotates at a constant angular velocity. The velocity at any height from stationery disk, say at x metres
[tex]U_o=v(\frac {x}{h})[/tex] where v is tangential velocity at radius r from the centre of disk
[tex]U_o=r\omega (\frac {x}{h})[/tex]
The radial component of velocity is given as
[tex]U_r=0[/tex]
The z component of velocity is also given as
W=0
Total velocity, [tex]v= r\omega (\frac {x}{h})\hat e_{o}[/tex]
