AIIMS2019Physics-Rotational Motion
AIIMS 2019 Physics Kinetic Energy of Rotation MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Ratio of total energy and rotational kinetic energy in the motion of a disc is
A
1:1
B
2:7
C
1:2
D
3:1
Correct Answer
Option A
Detailed Explanation
In the motion of a disc, the total energy (E) consists of both translational kinetic energy (TKE) and rotational kinetic energy (RKE). For a disc rolling without slipping, the relationship between these energies is such that TKE is equal to RKE, leading to a ratio of total energy to rotational kinetic energy of 1:1. Other options are incorrect because they suggest different relationships that do not hold true for a disc in pure rolling motion, where both forms of kinetic energy contribute equally to the total energy.
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