Space Time & Motion A.2 Forces & Momentum (id: 3b37ef6a1)

本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学

[单选题]
An object with a weight26lel-v ca .zh sd0z0d (db gu;$W$ connected to one end of a rod of negligible mass rotates at constant speed in a vertical plane.



When the object is at the top position of the circular path, the tension on the rod is zero. What is the magnitude of tension at the bottom position of the circular path?

A. Equal to $W$
B. Smaller than $W$
C. Equal to $2W$
D. Greater than $2W$


参考答案:  C


本题详细解析:

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