If the disk is rolling without slipping with a velocity at point O of $15$ ft$/$s and $=2$ rad$/$s$,$ determine the velocity of point A$.$

If the disk is rolling without slipping with a velocity at point O of $15$ ft$/$s and $=2$ rad$/$s$,$ determine the velocity of point A$.$

$45$ ft$/$s

$15$ ft$/$s

$-15$ ft$/$s

$0$ ft$/$s