AIIMS 2019 Physics Energy Conservation MCQ Question
Assertion : The velocity of a body at the bottom ofan inclined plane of given height, is more when it slides down the plane, compared to, when it rolling down the same plane.
Reason : In rolling down, a body acquires both kinetic energy of translation and rotation.
If both assertion and reason are true and reason is correct explanation of assertion.
If both assertion and reason are true and reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
In rolling motion, part of the potential energy (PE) is converted into both translational kinetic energy (KE) and rotational kinetic energy, which results in a lower translational velocity compared to sliding, where all potential energy is converted solely into translational kinetic energy. This distribution of energy in rolling leads to a decrease in the translational kinetic energy, making the velocity of the rolling object less than that of a sliding object under the same conditions. Option B is incorrect because the statement is true; option C is not applicable as the scenario is clear; option D is irrelevant as it does not address the question.
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