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m = 1 kg
v1 = 5 m/s
v2 = 17 m/s
dt = v2 - v1 = 17m/s - 5m/s = 12 m/s
t = 4 s
szukane:
F = ?
F = m * a
ale a = dv/t = 12m/s/4s = 3 m/s2
F = 1kg * 3m/s2
F = 3 N
m=1kg
Vp=5m/s
Vk=17m/s
t=4s
a=(Vk-Vp)/t <wzór na przyspieszenie
F=am <wzór na siłę
F=(Vk-Vp)/t * m
F=(17m/s - 5m/s)/(4s) * 1kg = 3N