Question

Va rog ajutați-ma ne da 10 daca o rezolvam asa ca că rog ajutați -ma primul răspuns primește coroana

Answer 1

[tex]Se~da:\\ \\ m=500g=0,5kg\\ \\ v=100\frac ms\\ \\ a)h=?m\\ \\ b)E_{c_1}=E_{p_1};~v_1=?\frac ms\\ \\ c)d=100cm=1m;~F=?N\\ \\ \\ Formule:\\ \\ a)E_p=E_c\\ \\ m\times g\times h=\frac {m\times v^2}2\\ \\ h=\frac {v^2}{2\times g}\\ \\ \\[/tex]


[tex]b)E_{c_1}+E_{p_1}=E_p\\ \\ 2\times E_{c_1}=m\times g\times h\\ \\ 2\times \frac{m\times v_1^2}2=m\times g\times h\\ \\ v_1=\sqrt{g\times h}\\ \\ \\ c)G-F=m\times a\\ \\ F=G-m\times a\\ \\ F=m\times (g-a)\\ \\ \\ d=\frac{v^2_1-v^2}{2\times a}\\ \\ d=\frac{-v^2}{2\times a}\\ \\ a=-\frac{v^2}{2\times d}\\ \\ \\ F=m\times(g+\frac{v^2}{2\times d})\\ \\ \\ [/tex]


[tex]Calcule:\\ \\ a)h=\frac{100^2}{2\times 10}=500m\\ \\ b)v_1=\sqrt{10\times500}\approx 70,71\frac ms\\ \\ c)F=0,5\times (10+\frac{100^2}{2\times 1})=2505N[/tex]