Monday, January 14, 2013

Momen Kopel – Penjelasan dan Rumus

Seorang sopir bus selama menjalankan busnya sering memberikan kopel pada stir bus agar jalannya bus dapat teratur. Apakah yang dimaksud kopel? Kopel adalah pasangan dua buah gaya yang sama besar, sejajar dan berlawanan arah. Kopel penyebab sebuah benda berotasi.
Gambar sebuah kopel dan gambar mengenai kopel yang merupakan besaran vektor 
Momen kopel merupakan hasil kali vektor antara vektor gaya dan vektor lengan gaya.
Persamaan momen kopel

Sehingga besar momen gaya dapat dinyatakan:
Rumus dan Persamaan momen gayaM = momen kopel (N . m)
L = lengan gaya (m)
F = gaya (N)
α = sudut antara lengan gaya dan gaya
a. Macam momen kopel ada dua, yaitu kopel positif dan kopel negatif.
Momen Kopel Positif dan Negatif

b. Jika pada sebuah benda bekerja kopel-kopel sebidang momen kopelnya dapat dinyatakan: MR = ΣM
c. Sifat-sifat kopel.
1) Sebuah kopel dapat diganti dengan kopel yang lain yang arah dan besarnya sama.
2) Jumlah momen kopel dari kopel-kopel yang sebidang sama dengan jumlah aljabar momen kopel dari kopel itu.
d. Resultan sebuah gaya dan sebuah kopel adalah gaya yang besarnya sama dengan gaya mula-mula dan letaknya bergeser sejauh:
Rumus resultan sebuah gaya dan sebuah kopel

Penjelasan Materi Lainnya



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