APFIVE Rotational Inertia of a Hoop and Bead
A system consists of a thin hoop of mass M and radius R, and a small bead of mass m attached to its rim. What is the rotational inertia of the system about an axis passing through the center of the hoop and perpendicular to its plane?
A
MR² + m(2R)²
B
MR² + 2mR²
C
(M+m)R²
D
MR² + mR²
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