Pengamatan eksperimen gerak harmonik dua batang menggunakan teknik perekaman timelapsed

KHAIRIYAH, Siti Asmah, Dr. ,Gede bayu Suparta

2009 | Tesis | S2 Ilmu Fisika

Penelitian ini menguji suatu sistem dua batang yang tergandeng yang mengalami gerak harmonik. Pengukuran variabel-variabel tersebut menggunakan teknik perekaman timelapsed, yang dapat mengamati perubahan posisi batang dari waktu ke waktu. Variabel-variabel gerak harmonik yang diamati meliputi periode, amplitudo, dan kecepatan. Kemudian, variabel-variabel yang didapatkan dicocokkan dengan hasil perumusan mekanika Lagrange. Berdasarkan hasil eksperimen, teknik perekaman timelapsed dapat digunakan untuk merekam dan mengukur variable-variabel dari gerak harmonik dua batang seperti amplitudo, periode dan kecepatan sudut. Periode dan amplitude osilasi akan membesar seiring dengan bertambahnya ukuran batang. Kecepatan sudut batang tidak bergantung pada panjang batang. Namun, kecepatan sudut maksimum dicapai pada saat simpangan batang minimun. Nilai-nilai variabel osilasi yang dihasilkan dengan teknik perekaman timelapsed belum sesuai dengan hasil perumusan persamaan Lagrange.

This research was carried out to test a harmonic motion system of a double rods pendulum. The variables were measured using a time lapsed recording technique that is able to examine the change of position of the rods from time to time. The examined variables were period, amplitudo, and angular velocity. Then, the variable measurements were compared to the results of the Lagrangian formulation. Based on the experiment, the time lapsed recording technique can be used for recording and measuring the variables of harmonic motion system of double rods pendulum such as the period, the amplitude and the angular velocity. The period and the amplitudo of the oscillation tends to increase as the length of the rods increase. The angular velocity tends to be constant regardless the length of the rods. However, the angular velocity was maximum when the deviation was minimum. The measurements resulted from this time lapsed method are unfit to the results from the Lagrangian formulation.

Kata Kunci : Gerak harmonik,Osilasi,Teknik perekaman timelapsed,Lagrange, harmonic motion, oscillation, time lapsed recording, Lagrange