2. A hoop and disc have same mass and radius. Their rotational K.E are related by an equation September 17, 2025 by Admin A. K.E hoop = K.E disc B. K.E hoop = 2K.E disc C. K.E hoop = 1/2K.E disc D. K.E hoop = 4K.E disc ✅ The correct answer is option B.
