Rotational Kinetic Energy

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Rotational kinetic energy of rigid body is:

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I ω

$I ω^{2}$

$(1/2) I ω^{2}$

$(1/2) I / ω^{2}$

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Subject: physics
Chapter: rotational motion
Topic: rotational kinetic energy
Difficulty: Easy
Year: 2025

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Correct Answer:

$(1/2) I ω^{2}$

Kinetic energy associated with pure rotation is analogous to translational kinetic energy ( $K_{t r an s} = \frac{1}{2} m v^{2}$ ). Replacing mass $m$ with moment of inertia $I$ and linear speed $v$ with angular speed $ω$ : $K_{ro t} = \frac{1}{2} I ω^{2}$

SI Unit: Joules ( $J$ ).
For a rolling object, the total kinetic energy is the sum of translational and rotational components.

This easy difficulty physics question is from the chapter rotational motion, covering the topic of rotational kinetic energy. It appeared in the 2025 exam.

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Rotational Kinetic Energy

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