How does the tapered rim of a wheel on a railroad train allow one part of the ri

Question

How does the tapered rim of a wheel on a railroad train allow one part of the rim to have a greater tangential speed than another part when it is rolling on a track? What is rotational inertia, and how is it similar to inertia as studied in earlier chapters? Can two objects have the same inertia but a different moment of inertia? As distance increases between most of the mass of an object and its center of rotation, does rotational inertia increase or decrease: Consider three axes of rotation for a pencil: along the lead, at right angles to the lead at the middle, and at right angles to the lead at one end. Rate the rotational inertias about each axis from smallest to largest.

Explanation / Answer

6) yes it is very much possible. Any two body of same mass have same inertia. But moment of inertia depends on shape. So if the have different shape , they will definitely have different moment of inertia.

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