Kater’s pendulum

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In pendulum
…special reversible compound pendulum called Kater’s pendulum is designed to measure the value of g, the acceleration of gravity.
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In gravity: Absolute measurements
…of swing of a rigid pendulum about two alternative points of support are the same, then the separation of those two points is equal to the length of the equivalent simple pendulum of the same period. By careful construction, Kater was able to measure the separation very accurately. The so-called…
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