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30 October, 23:56

The rotational inertia of an object is greater when most of the mass is located

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  1. 31 October, 03:43
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    away from the rotational axis.

    Explanation:

    Newton's first law for rotational movement:

    An object that revolves around an axis tends to remain spinning around that axis, unless it interferes some external influence.

    The spinning bodies tend to stay spinning, while those who do not turn tend to remain without turn. In other words, the greater the time of inertia, more difficult is to change the state of rotation of that object.

    This property is called rotational inertia or Momentum of inertia.

    The moment of inertia (or rotational moment) depends on:

    - The mass of the object

    - The distribution of mass

    The farther the thickness of the object's mass is of the axis of rotation, the greater the moment of inertia.

    In fact, the moment of inertia I is proportional to the mass and squared distance to the axis:

    I = m * (r) ^2
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