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• momen inersia
a][
Iaa = (2m)(b)² + (m)(2b)² + (3m)(3b)²
Iaa = 2mb² + 4mb² + 27mb²
Iaa = 33mb² ← jwb
b][
Ibb = (m)(2b)² + (2m)(b)² + (3m)(b)²
Ibb = 4mb² + 2mb² + 3mb²
Ibb = 9mb² ← jwb