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【Daily Question】Theoretical Foundation 2020.03.02

2020-03-02View Original

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Multiple-choice question: A homogeneous cylinder with radius R and mass m rotates freely about a fixed horizontal axis perpendicular to the paper plane; it is at rest at the initial moment (with G on the vertical line of axis O), as shown in the figure. Then the angular velocity of the cylinder at position θ=90° is ( ). Answer: C. Hint: An additional reward will be given to those who can explain the solution process; the answer can be found in the response!

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