VL 10 hk2 chan troi sang tao on tap

$$F^{2\ }=F_1^{2\ }+F_{2\ }^2+2F_1F_2\cos\left(\alpha\ \right)$$

$$F^{2\ }=F_1^{2\ }+F_{2\ }^2-2F_1F_2\cos\left(\alpha\ \right)$$

$$F^{\ }=F_1^{\ }+F_{2\ }^{ }+2F_1F_2\cos\left(\alpha\ \right)$$

$$F^{2\ }=F_1^{2\ }+F_{2\ }^2-2F_1F_2$$

Trong mọi trường hợp: $$\left|F_1^{ }-F_2\right|\ \le\ F\le\ F_1^{ }+F_2$$

Hai lực hợp với nhau góc 60⁰.

M = F/d

$$\frac{F_1}{d_{1\ }}=\frac{F_2}{d_2}$$

$$F_1.d_1=F_2.d_{2\ }$$

$$30\sqrt{\ 2}$$ N.

30N.

$$15\sqrt{3}$$ N.

90⁰

60⁰

30⁰

45⁰