Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Rod Pendulum

罗德摆

Note that the period is independent of the mass and radius of the rod.

注意，周期与杆的质量和半径无关。

A physical pendulum in the form of a uniform rod suspended by its end has period

一个以均匀杆形式呈现的物理摆，其周期为
For pendulum length L =
对于摆长L =
 cm and
厘米和
中文译文中的待填/计算数值依次对应：1：L。实际数值以上方原输入框为准。
acceleration of gravity g =
重力加速度 g =
m/s2
the pendulum period is T =
单摆的周期是 T =
 s

compared to a period T = s for a simple pendulum.
(Enter data for two of the variables and then click on the active text for the third variable to calculate it.)

与单摆的周期 T = s 相比。（输入两个变量的数据，然后点击活动文本以计算第三个变量。）
中文译文中的待填/计算数值依次对应：1：g 2：t 3：ts。实际数值以上方原输入框为准。
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Periodic motion concepts
索引 周期性运动概念
 
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