College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Two disks are initially spinning, one above the other on a small axle that provides a small, but non-negligible torque from friction, as shown in the figure below. Both disks have the same radius, R = 2.58 m. Disk 1 has a moment of inertia I1 = 9.8 kg⋅m2. Disk 2 has a moment of inertia I2 = 5 kg⋅ m2. Let vertically up be the z direction, such that counterclockwise rotation as viewed from above corresponds to positive values of the z-component. Disk 1 is initially spinning with a z-component of
Disk 1 is then dropped on disk 2, and the two discs quickly reach a common, final angular velocity. Find the z-component of their common angular velocity.
Transcribed Image Text:The image shows two cylindrical disks labeled "Disk 1" and "Disk 2." Each disk has an arrow indicating rotation around a vertical axis.
- **Disk 1**: The arrow above the disk curves to the right, showing clockwise rotation when viewed from above.
- **Disk 2**: The arrow above this disk is curved to the left, indicating counterclockwise rotation when viewed from above.
This diagram is helpful in understanding rotational motion with respect to different directional conventions.
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