Local gravity measurement by using the simple pendulums
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Abstract
Engineering calculations requiring precise gravity measurements for accurate outcomes must consistently use the local gravitational acceleration. This article presents the results of determining local gravity by applying Newton's second law to a simple pendulum as a gravimeter. The study was conducted at a location of latitude 18°39’43’’ N and an altitude of 300 m AMSL. Results from this study indicated, that by using the simple pendulums of lengths of 1.00 m, 1.05 m, 1.10 m, 1.15 m and 1.20 m and timing 100 oscillation cycles, the experimental local gravity obtained was 9.7635±0.006 m/s2. Compared with the calculated local gravity 9.7847 m/s2, the error of the local gravity obtained was 0.2%, approximately.
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