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

question 56

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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