Odpowiedź:
Zadanie 1
a=Vk-Vp/t
a=12-2/10
a=10/10
a=1m/s^2
Wyjaśnienie:
Sorry, reszty nie rozumiem
t = 10s
vp = 2 m/s
vk =12 m/s
oblicz a
a = Δv/t
Δv = vk - vp
a = (vk-vp)/t
a = (12-2)m/s /10s
a = 10 m/s /10s
a =1 m/s²
Zad2
t = 2 min = 120 s
s = 4 km = 4 000m
oblicz v
v = s/t
v = 4000m/120 s
v = 3,33 m/s
v = 3,33*3600/1000 km/h
v = ok. 12 km/h
zad3
a = 1 m/s²
v = 36 km/h = 36000m/3600s = 10 m/s
oblicz t,s
v = a*t
v = 1 m/s²*10s
v = 10 m
droga
s = a*t²/2
s = 1m/s²*(10s)²/2
s = 50m
