Four identical particles, each with mass m, are arranged in the x, y plane as shown. They are connected by light sticks to form a rigid body. If m = 2.0 kg and a = 1.0 m, the rotational inertia of this array about the y-axis is:
A) 4.0 kg . m2
B) 12 kg. m2
C) 9.6 kg . m2
D) 4.8 kg . m2
E) none of these
Correct Answer:
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