Fizyka błagam was pomóżcie mi <3 daje naj i 60 punktów :D

Zad 1. Rysunek w załączniku. [latex]v_{liscia}=11km/h=11* frac{1000}{3600}=3,1m/s \ v_{wyp}= sqrt{(v_{liscia})^2+(v_{wiatru}})^2\ v_{wyp}=sqrt{(3,1m/s)^2+(5m/s})^2}\ v_{wyp}=15,5m/s\ Zad2.\ v_s+v_w= frac{6460m}{2*60s}= 53,83m/s\ v_s-v_w=frac{6460m}{4*60s}=26,92m/s\ +------------\ 2v_s=53,83m/s+26,92m/s=80,75m/s\ v_s=40,38m/s\ v_s+v_w= 53,83m/s\ v_w=53,83m/s-40,38m/s=13,45m/s\ v_s=40,38m/s\ v_w=13,45m/s\[/latex] Zad 3. [latex]v_{sr}= frac{s_1+s_2}{t_1+t_2}\ v_1= frac{s_1}{t_1} \ v_1{t_1}=s_1\ t_1= frac{s_1}{v_1} \ t_1= frac{90km}{120km/h} =0,75h\ v_{sr}= frac{90km+180km}{0,75h+4h}=56,84km/h\[/latex]