Pengembangan Alat Praktikum Tumbukan Menggunakan Mikrokontroler, Sensor Ultrasonik, dan Lintasan Air Track

Khaerul Umam*  -  Universitas Negeri Semarang, Indonesia
Hartono Hartono  -  Universitas Negeri Semarang, Indonesia
Sulhadi Sulhadi  -  Universitas Negeri Semarang, Indonesia

(*) Corresponding Author
DOI: 10.21580/perj.2021.3.2.8706

Momentum is one of the physics topics that students can better understand with practical activities. The problem found in using the ticker timer as a speed gauge in the collision practicum is that the measurement process interferes with the system being measured. This research develops a collision practicum tool using a microcontroller and ultrasonic sensor as a distance recorder. The glide track used is an air track. Based on the research conducted, it can be concluded that the collision practicum tool with a microcontroller and a glide track in the form of an air track can work well. The distance recorder or DRD is capable of recording distances every 0.2 seconds. The ultrasonic sensor as a gauge has an accuracy of 99.6% and a relative error of 0.56% for sensor 1. Meanwhile, sensor 2 has an accuracy of 99% and a relative error of 0.85%. Through the distance data obtained, it is possible to obtain an increase in momentum before and before the collision.

Keywords: Collision; Microcontroller; Ultrasonic sensors; Air track.

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