Exam-style question
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What is the effect of increasing the moment of inertia on the angular velocity of a rotating object, assuming no external torques are applied?.
- A.Angular velocity increases.
- B.Angular velocity decreases.
- C.Angular velocity remains constant.
- D.Angular velocity becomes negative.
Model answer
What a good answer should say
- Angular velocity decreases.
Explanation
Why this works
According to the conservation of angular momentum, if the moment of inertia increases while no external torques are acting, the angular velocity must decrease to keep the angular momentum constant.
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