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You have a disc and a hoop of same mass and size. Which of the two has greater moment of inertia and why?

You have a disc and a hoop of same mass and size. Which of the two has greater moment of inertia and why?

Grade:12th pass

1 Answers

Arun
25750 Points
6 years ago
Try to think of moment of inertia as the angular analogue of mass. To understand it better, you might want to look up a derivation of a hoop and disk`s moment of inertia. Essentially, the hoop`s is higher because it`s mass is distributed more around the edges (a higher radius) than closer (a smaller radius). Hope that helps!

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