https://ph01.tci-thaijo.org/index.php/jermutt <p>Frontiers in Engineering Innovation Research has ISSN 3056-9273 (Online). It has published the high quality of article on physical science and technology which emphasize on engineering research. The target groups of the publication consist of lecturer, under graduate student, graduate student and researcher whose are the insider and third party of Rajamangala University of Technology Thanyaburi. This journal has published 2 issues per year such as the issue number 1 on January to June and the issue number 2 on July to December. </p> en-US <p>The manuscript, information, content, picture and so forth which were published on Frontiers in engineering innovation research has been a copyright of this journal only<span lang="TH">. </span>There is not allow anyone or any organize to duplicate all content or some document for unethical publication. </p> enjournal@en.rmutt.ac.th (ผศ.ดร.ปรกช สิริสุวัณณ์) enjournal@en.rmutt.ac.th (อมรรัตน์ ยิ้มอยู่) Wed, 02 Apr 2025 08:50:37 +0700 OJS 3.3.0.8 http://blogs.law.harvard.edu/tech/rss 60 https://ph01.tci-thaijo.org/index.php/jermutt/article/view/258078 <p>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.</p> Bancha Kongtragool, Saichon Sithipong Copyright (c) 2025 Frontiers in Engineering Innovation Research https://creativecommons.org/licenses/by-nc-nd/4.0 https://ph01.tci-thaijo.org/index.php/jermutt/article/view/258078 Wed, 02 Apr 2025 00:00:00 +0700