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V = 20 [m/s]
t = 5 [s]
V = at
a = V/t
F = m * a
F = mV / t
Odp: F = 1000*20/5 = 4000 [N]
a = Δv/Δt
a = 20m/s / 5s
a = 4m/s²
Teraz z drugiej zasady dynamiki Newtona:
a = F/m
z tego
F = a * m
F = 4m/s² * 1000 kg
F = 4000N
V=20m/s
t=5s
F=a*m
V= a*t -> a=V/t
F=(V/t) *m
F=(20:5) * 1000
F=4000 N [kg × m/s²]