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A solid cylinder and a hollow cylinder both of the same mass and same external diameter are released from the same height at the same time on an inclined plane. Both roll down without slipping. Which one will reach the bottom first?

1. Both together
2. Solid cylinder
3. One with higher density
4. Hollow cylinder

Correct answer: Solid cylinder

Solution

The solid cylinder will reach the bottom first because it has a smaller moment of inertia compared to the hollow cylinder, allowing it to accelerate faster while rolling down the incline.

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