Ta có:
\(\dfrac{F_1}{F_2}=\dfrac{Psin\alpha_{01}}{Pcos\alpha_{02}}\)
Mà \(\left\{{}\begin{matrix}Psin\alpha_{01}\approx\dfrac{s_{01}}{l_1}\\Psin\alpha_{02}\approx\dfrac{s_{02}}{l_2}\end{matrix}\right.\)
Từ đó suy ra:
\(\Rightarrow\dfrac{F_1}{F_2}=\dfrac{s_{01}}{s_{02}}\cdot\dfrac{l_2}{l_1}=\dfrac{2}{3}\cdot\dfrac{2}{3}=\dfrac{4}{9}\)
\(\dfrac{F_1}{F_2}=\dfrac{P\sin a_{01}}{P\sin a_{02}}\approx\dfrac{\dfrac{s_{01}}{l_1}}{\dfrac{s_{02}}{l_2}}=\dfrac{s_{01}}{s_{02}}=\dfrac{2}{3}.\dfrac{2}{3}=\dfrac{4}{9}\)