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【Daily Question】Theoretical Foundation 2020.03.05

2020-03-05View Original

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This post was last edited by Qingse Nianhua on 2020-3-5 08:50. Multiple-choice question: A homogeneous thin rod of mass m and length 2l is initially in a horizontal position, as shown in the figure. After end A detaches, the rod rotates around axis B; when the rod reaches a vertical position, the magnitude of the angular acceleration of rod AB is ( ). Answer: A Hint: Extra rewards will be given to those who can explain the solution process; the answer can be seen there!

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