Exam-style question
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A rotating disk has an initial angular momentum of 10 kg·m²/s. If no external torque acts on it, what will be its angular momentum after 5 seconds?.
Model answer
What a good answer should say
- The angular momentum will remain 10 kg·m²/s.
Explanation
Why this works
This question tests the understanding of the conservation of angular momentum, which states that in the absence of external torques, the angular momentum of a system remains constant. Since no external torque is acting on the disk, its angular momentum does not change.
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