A white disc speeds up with tangential acceleration a at a distance r from its center. A black disc has a tangential acceleration of 3a at a distance 2r from its center. How does the angular acceleration of the white disc a white compare with the black disc ablack? Choose 1 answer: A B D awhite = awhite = awhite = Owhite 1 6 2 3 ablack ablack 3 2 ablack 6αblack