in fig 1 Right hand rule: turn the fingers of your right hand along the sense of rotation, the direction in which the thumb points is the direction of the angular velocity. In this case the direction of the angular velocity of the disc is pointing perpendicularly upwards from the plane of rotation of the disc
in fig 2 In this case the direction of the angular velocity of the disc is pointing perpendicularly downwards from the plane of rotation of the disc.
"I a universe of atoms.......an atom in the universe"
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