Two uniform circular discs having the same mass and same thickness but different radii are made from different materials .Which one of the disc have smaller rotational inertia and why?

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Casey DurganLv2

18 Feb 2019

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A ring and a circular disc of different materials have equal masses and equal radii. Which one will have a larger MOI about an axis passing through its center of mass and perpendicular to its plane?

The primary objective of this experiment is to find arelationship between the moment of
inertia and the radius for discs of the same mass. A secondaryobjective is to develop a general
equation relating the moment of inertia and radius for discs of anymass.

1) Friction in the axle bearing plays a role in the experiment.How might it have affected the results you obtained?

2) The mass of the axle and bearing is about 225 g, which isroughly half that of the discs, but its moment of inertia is verysmall. Explain why.

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Two uniform circular discs having the same mass and same thickness but different radii are made from different materials .Which one of the disc have smaller rotational inertia and why?

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