A disc and ring have the same mass and the same radius. If we denote the moment of inertia of the disk by Id and that of the ring by Ir , then
Correct answer: A. Ir >Id
- A. Ir >Id
- B. Ir <Id
- C. Ir −Id
- D. Ir =Id
Explanation
The moment of inertia of a ring is greater than that of a disk of the same mass and radius. This is because the mass in a ring is distributed farther from the axis of rotation compared to a disk, resulting in a larger moment of inertia. Therefore, Ir >Id .
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Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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