Dua buah vektor gay A dan B membentuk sudut 90°. jika masing-masing vektor memiliki besar 15 N dan 20 N ,tentukan resultan vektor A dan B ?
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α = 90
F1 = 15 N
F2 = 20 N
dit : R ?
dijawab :
R = √(F1²+F2² + 2F1F2cosα)
= √(15²+20²+ 2x15x20xcos90)
= √(225+400 + 2x15x20x0)
= √625
= 25 N