Four Identical Particles, Each with Mass M, Are Arranged in the X

question 84

Multiple Choice

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

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