Parallel axis theorem states I_parallel = I_cm + Md². Here d is:
ATime period
BThe radius
CPerpendicular distance between two parallel axes
DTotal mass
Answer & Solution
Correct answer: C. Perpendicular distance between two parallel axes
Parallel axis theorem: I about any axis = I about parallel axis through center of mass + M × d², where d is the perpendicular distance between the axes.
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