| 11. | So what I need is the moment of inertia of a trapezoidal prism.
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| 12. | See the formulae in the List of Moments of Inertia article.
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| 13. | And I'm looking for mass moment of inertia not area moment of inertia.
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| 14. | It distributes mass away from the pivot point, thereby increasing the moment of inertia.
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| 15. | As described in the moment of inertia, the angular momentum "'L "'can be written
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| 16. | Where I is the moment of inertia of the body.
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| 17. | I have estimates for the three principal moments of inertia.
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| 18. | Now apply the same analysis to axis with moment of inertia I _ 2.
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| 19. | Where "'I "'in is the moment of inertia tensor calculated in the inertial frame.
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| 20. | The child's motions vary the moment of inertia of the swing as a pendulum.
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