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BENDA TEGAR - Mirza Satriawan

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Teorema sumbu tegak lurus<br />

Tinjau benda pada gambar di bawah ini<br />

Kita ketahui bahwa<br />

<br />

Iz = r 2 <br />

⊥dm =<br />

(x 2 + y 2 )dm = Iy + Ix<br />

(24)<br />

Jadi momen inersia terhadap suatu sumbu sama dengan jumlah momen<br />

inersia terhadap dua sumbu yang saling tegak terhadapnya<br />

19/36<br />

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