AP Physics 1· difficulty 2/5
A disk spins counterclockwise when viewed from above. By the right-hand rule, the direction of its angular-momentum vector is
Upward
Downward
Counterclockwise along the rim
Clockwise along the rim
Explanation
Curl the right-hand fingers along the rotation direction; the thumb points along . For CCW-viewed-from-above, the thumb points <strong>up</strong>.
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