Design And Build A Practicum Equipment For The Law Of Conservation Of Mechanical Energy Of Rolling ObjectsYulkifli, Siti Riva Darwata, Yohandri, Asrizal, Yenni Darvina, Alwi Nofriandi and Nur Anisa Sati’atE3S Web Conf., 400 (2023) 01015DOI: https://doi.org/10.1051/e3sconf/202340001015