Question

Sabendo que A= 6u e B= 8u, determine o módulo do vetor resultante em cada caso​

Answer 1

$Dados:\left \{ {{a=6} \atop {b=8}} \right. \\\\\\Resposta:\\\\a)\\6+8=14\\V^{r}=14\\\\b)\\V^{r}=8-6\\V^{r}=2\\\\c)\\Neste\ exemplo\ possuimos\ um\ angulo\ de\ 90\ graus:\\\\c^{2}=b^{2}+a^{2}\\c^{2}=8^{2}+6^{2}\\c^{2}=64+36\\c=\sqrt{100} \\c=10\\\\d)\\S^{2}=b^{2}+a^{2}+2.a.b.Cos\alpha\\S^{2}=8^{2}+6^{2}+2.6.8.\ 0,5\\S^{2}=64+36+48\\S^{2}=100+48\\S=\sqrt{148} \\s=12,16$