Salut,
Problema 4, vitezele sunt constante, deci:
[tex]v_{med}=\frac{d_{total\check{a}}}{t_{total}}=\frac{d_1+d_2}{t_{total}}}=\frac{v_1\cdot t_1+v_2\cdot t_2}{t_{total}}=\\=\frac{v_1\cdot\frac{t_{total}}{3}+v_2\cdot\frac{2\cdot t_{total}}{3}}{t_{total}}=\frac{v_1}{3}+\frac{2\cdot v_2}{3}[/tex]
Te las pe tine să faci calculele.
Green eyes.
