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Dik :F1 = 5 N,
F2 = 12 N,
sudut = 60°
Dit : Resultan kedua vektor ?
f=√F+F2+ 2(F1)(F2) COS 60
=√5²+12²+2(5)(12) (0,5)
=√25+144+60
=√229
=15,13N