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2. Moment of inertia - Wikipedia

   en.wikipedia.org/wiki/Moment_of_inertia

   In this case, the moment of inertia of the mass in this system is a scalar known as the polar moment of inertia. The definition of the polar moment of inertia can be obtained by considering momentum, kinetic energy and Newton's laws for the planar movement of a rigid system of particles. [15] [18] [25] [26]

3. List of moments of inertia - Wikipedia

   en.wikipedia.org/wiki/List_of_moments_of_inertia

   The moments of inertia of a mass have units of dimension ML 2 ([mass] × [length] 2). It should not be confused with the second moment of area, which has units of dimension L 4 ([length] 4) and is used in beam calculations. The mass moment of inertia is often also known as the rotational inertia, and sometimes as the angular mass.

4. Second moment of area - Wikipedia

   en.wikipedia.org/wiki/Second_moment_of_area

   In physics, moment of inertia is strictly the second moment of mass with respect to distance from an axis: =, where r is the distance to some potential rotation axis, and the integral is over all the infinitesimal elements of mass, dm, in a three-dimensional space occupied by an object Q. The MOI, in this sense, is the analog of mass for ...

5. Moment (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Moment_(mathematics)

   In mathematics, the moments of a function are certain quantitative measures related to the shape of the function's graph.If the function represents mass density, then the zeroth moment is the total mass, the first moment (normalized by total mass) is the center of mass, and the second moment is the moment of inertia.

6. Second polar moment of area - Wikipedia

   en.wikipedia.org/wiki/Second_polar_moment_of_area

   The second polar moment of area, also known (incorrectly, colloquially) as "polar moment of inertia" or even "moment of inertia", is a quantity used to describe resistance to torsional deformation , in objects (or segments of an object) with an invariant cross-section and no significant warping or out-of-plane deformation. [1]

7. Inertia - Wikipedia

   en.wikipedia.org/wiki/Inertia

   Inertia is the natural tendency of objects in motion to stay in motion and objects at rest to stay at rest, unless a force causes the velocity to change. It is one of the fundamental principles in classical physics, and described by Isaac Newton in his first law of motion (also known as The Principle of Inertia). [1]

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9. List of second moments of area - Wikipedia

   en.wikipedia.org/wiki/List_of_second_moments_of_area

   The second moment of area, also known as area moment of inertia, is a geometrical property of an area which reflects how its points are distributed with respect to an arbitrary axis. The unit of dimension of the second moment of area is length to fourth power, L 4, and should not be confused with the mass moment of inertia.