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ke timur dan berjalan sejauh 8 m.
a. lukiskan pergerakan orang tersebut menjadi dua vektor perpindahan (sebelum dan
setelah belok)!
b. lukis resultan dua vektor tersebut dengan metode poligon!. Tanpa melakukan
pengukuran, perkirakan apakah nilai resultannya lebih besar dari dua vektor yang
diresultankan?
c. berapakah sudut apit dua vektor perpidahan tersebut?
d. dengan menggunakan rumus cosinus tentukan resultan perpindahan orang tersebut!
e. dengan rumus sinus tentukan pula arah perpindahannya!
3. Perahu motor bemaksud menyebragi sungai yang aliran airnya memiliki kecepatan 3
m/s. Perahu yang memiliki kecepatan 4 m/s diarahkan tegak lurus dengan aliran air.
Tentukan resultan kecepatan perahu dan arah gerak perahu terhadap arah aliran air!
4. Sebuah balok ditarik dengan gaya F1 = 8 N dan F2 = 10 N yang membentuk sudut apit 60o.
Tentukan :
a. resultan dua vektor tersebut dengan rumus cosinus!
b. arah resultan gaya terhadap F1.
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