Tuesday, January 15, 2013

Momen Inersia – Penjelasan dan Rumus

Apakah momen inersia itu, mari kita mulai dari pembahasan momen inersia titik partikel.

Gerak Rotasi partikelGambar 6.11 melukiskan sebuah titik partikel dengan massa m sedang melakukan gerak rotasi pada sumbunya dengan jari-jari R.

Momen inersia dari titik partikel tersebut dinyatakan sebagai hasil kali massa partikel dengan kuadrat jarak partikel ke sumbu putar (jari-jari). Dengan demikian momen inersia titik partikel dapat dinyatakan dengan:

Rumus Momem Inersia

Benda yang terjadi dari beberapa partikel yang berotasi pada sumbunya maka momen inersianya merupakan jumlah momen inersia dari partikelpartikel yang terkandung di dalam benda tersebut. Sehingga dapat dinyatakan dengan:


Rumus Momen inersia dari kumpulan partikel pada suatu benda

Benda-benda yang teratur bentuknya dan berotasi pada suatu sumbu tertentu mempunyai persamaan momen inersia tertentu seperti pada tabel 6.1 berikut.

Tabel 6.1 Momen Inersia untuk Bangun Beraturan
Momen Inersia untuk Bangun BeraturanMomen Inersia untuk Bangun Beraturann2

Keterangan:
m = massa benda
L = panjang benda
R1 = jari-jari dalam
R2 = jari-jari luar


Penjelasan Materi Lainnya



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