JEE Main 2024 — Rotational Motion Question with Solution
From: JEE Main 2024 (Online) 27th January Evening Shift
Question
A ring and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of both bodies are identical and the ratio of their kinetic energies is , where is _________.
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Show full solutionCorrect answer: 7
Correct answer
7
Step-by-step explanation
In pure rolling work done by friction is zero. Hence potential energy is converted into kinetic energy. Since initially the ring and the sphere have same potential energy, finally they will have same kinetic energy too.
Ratio of kinetic energies
Ratio of kinetic energies
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This is a previous-year question from JEE Main 2024, covering the Rotational Motion chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.