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[Daily Question] Theoretical Basis 2020.02.29

2020-02-29View Original

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Multiple choice questions: The homogeneous thin straight rod OA has a length l and a mass m. A small ball of mass m is fixed at end A (regardless of size), as shown in the figure. When the OA rod rotates around the O-axis at a uniform angular velocity ω, the momentum moment of the system about the O-axis is (). Answer: D Tip: Those who can explain the problem-solving process will be given extra rewards, and the answers will be visible in the replies!

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