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Question 30332
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Rigid Body Dynamics: MOI — System MCQ

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MOI — SystemHardQuestion 30332

Question

Two particles, each of mass m, are located at (a, 0) and (−a, 0). The moment of inertia about the y-axis is:
  1. A
    ma²
  2. B
    2ma²
    Correct
  3. C
    4ma²
  4. D
    ma²/2

Correct answer

2ma²

Explanation

I_y = Σmᵢxᵢ² = m×a² + m×a² = 2ma².

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