The objective of this study is to develop a free fall motion experiment based on smart phone using Phyphox application and to determine its usability and perception among pre-service teacher. The research development is based on the ADDIE model. Thirty participants were sampled using simple random sampling technique. A questionnaire instrument was used to collect the usability, ease of use and satisfaction data of the experimental kit. Data were analyzed descriptively using percentage of agreement, mean and standard deviation. Both instrument and kit are measured by three experts and gain overall validity is 95% which is interpreted as very good. A pilot test was carried out among fifteen pre-service teachers where the reliability of the usability questionnaire is α =.92 (excellent). In result, the average mean for usability is 3.91, ease to use is 3.84 and satisfaction is 3.91 out of four, which implies the average percentage of agreement is 87.25%. In conclusion, the development of a free fall motion experiment using Phyphox application was valid and reliable, as well as high agreement among pre-service teachers. Implications of the study, the experiment kit developed is suitable for use in learning to help students understand the subtopics of free fall motion.
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