Two circular discs have the same mass and same thickness but are made of different materials (implying different densities). Equal amounts of work are done on both discs to provide rotational motion from rest. It is observed that one disc rotates with a lower angular velocity (moves slower) than the other. Which of the following statements is true?

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Physics · Rotational Motion

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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The one that moves slower is made from a denser material.

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Answer 1

Both discs have the same moment of inertia.

Answer 2

The disc that moves faster has a greater moment of inertia.

Answer 3

The one that moves slower is made from a denser material.

Answer 4

The one that moves faster is made from a denser material.

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