prosie pomóżcie numer 60

[latex]t_w=t_s=0,8+(frac{1,2-0,8}{2})=1s\\ t_w=frac{v_0sinalpha}{g}Rightarrow v_0=frac{t_wg}{sinalpha}\\ v_0=frac{1*10}{0,5}\\ v_0=20frac{m}{s}\\ L=frac{v_0^2sin2alpha}{g}=frac{2v_0^2sinalphacosalpha}{g}\\ L=frac{2*20^2*0,5*0,866}{10}\\ L=frac{346,4}{10}\\ L=34,64m[/latex] Pozdrawiam, Adam