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a=v/t
F=m*v/t
F=1000kg*20/20
F=1000N
V=72km/h = 72 * 1000m/3600s = 72000/3600 = 20
1440-1000=440
Odp:na samochód trzeba dizalac sila 440km/h
niewiem czy do konca dobrze jak źle to przepraszam :)
m=1000kg
t= 20s
v= 72km/h = 20 m/s
Szukane :
F= ?
v=s :t
s= v * t
s= 20m/s * 20 s
s=400 m
F= m *s
F= 1000kg * 400 m
f=400000 N