Two particles (m1 = 0.20 kg, m2 = 0.30 kg) are positioned at the ends of a 2.0-m long rod of negligible mass. What is the rotational inertia of this rigid body about an axis perpendicular to the rod and through the center of mass?
A. 0.48 kg?m2
B. 0.50 kg?m2
C. 1.2 kg?m2
D. 0.80 kg?m2
E. 0.70 kg?m2
Answer: A
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