This research is to study the creat

This research is to study the creation of tools for the acceleration due to gravity (g) by the method to free fall. Saving can be used by matching the time falling ball steel from sensor signals at altitude(h) 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55 meters respectively. The distance of the fall of the iron spheres (h), with period with the squared to write graph to the slope from the graph. To find the next gravity and compare slope obtained from the tool to the acceleration due to earth's gravity in the classroom Science Valaya Alongkorn Rajabhat University. And find the percentage error of the theoretical values. This research was divided into two phases: Phase 1 study of the efficiency of tools find the acceleration due to gravity of the created world. It was found that from the tool of the gravity science classroom as 8.88 m/s from tools create equal 8.34m/s . When find the percentage errors from the theoretical gravity which is equal to 9.81m/s . Found that the gravity from the tools of science classrooms error 9.48%. From tools that create a discrepancy 14.98%. Phase 2 find for the acceleration due to gravity of the Earth in the space, Pathum Thani province. By using experimental area as following Khlong Luang District, Nakhon Pathom, PLA Pak District, Nong SUEA District. It was found that from the tool of the gravity science classroom as 7.84 m/s , 11.76 m/s , 9.52 m/s , 7.14 m/s respectively. From tools create equal 9.52 m/s , 11.42 m/s , 10.00 m/s , 6.26 m/s respectively. When find the percentage errors from the theoretical gravity which is equal to 9.81m/s . Found that the gravity from the tools of science classrooms error 20.08%, 19.88%, 2.96%, 27.22% respectively and from tools that create a discrepancy 2.96%, 16.41%, 1.94%, 36.19% respectively. From the values obtained showed that the tool created has error high percentage. Therefore, the need to improve the acceleration tool find due to gravity to give effectively increase and design tools can find the experiment in mechanics other stories.