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VEKTOR

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E. Latihan

1. Dua buah vektor, A dan B, masing-masing besarnya 30 N dan 40 N. Tentukanlah

resultan kedua vektor tersebut jika,

a. Searah
b. Berlawanan arah

c. Saling tegak lurus

d. Tentukan pula resultan dan selisihnya jika kedua vektor tersebut membentuk sudut
sudut 60°.

2. Gambar 3.25 melukiskan sebuah perahu sedang menyeberangi sungai. Air sungai
mengalir ke kanan.
a. Jika arah gerak perahu diarahkan tegak lurus arah
arus sungai. Dapatkah gerak perahu melalui

lintasan AB? Beri penjelasan! Jika tidak dapat

melalui lintasan AB, maka ke arah mana perahu
menyeberangi sungai?

Gambar 3.25 Sketsa Soal b. Agar perahu dapat menyeberangi sungai melalui
lintasan AB, ke arah mana perahu harus
digerakkan?

E-Modul Fisika Berbasis Model Discovery Learning Terintegrasi Pembelajaran Abad 21 97