Question Detail
Question
The rotational kinetic energy K_R of an object with moment of inertia I rotating at angular speed ω is given by
Correct Answer
Option D is the correct answer.
Detailed Explanation
The formula for rotational kinetic energy is K_R = ½ Iω². It is analogous to the translational kinetic energy formula ½ mv², with I replacing m and ω replacing v.
Hint
This formula is the rotational analog of ½ mv². The factor of ½ and the square on the speed are retained.