Question

Ball thrown over a rotating platform.

Answer 1

\[A: x=R_A \cos(\omega t); y=R_A \sin(\omega t)\]
\[B: x=R_B \cos(\omega t+ \phi_0 ); y=R_A \sin(\omega t+\phi_0)\]
A throws a ball to B. Which velocity should the ball have in order to reach B?

Answer 2

the ball doesn't touch the platform right?

Answer 3

we neglect vertical motion (let's keep it simple!)
the platform rotates with angular velocity omega in counterclockwise sense.
(MY) SOLUTION: is it RIGHT or WRONG?
coordinates of the ball
\[BALL(^°): x^°=v_{0x}t; y^°=v_{0y}t\]
they must be equal at a certain time to those of B:
\[x^°=x_B; y^°=y_B\]