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t = 5s
V₀ = 0 m/s
V = 20 [km/h] = 20 000 m / 3600 s = 5,5 m/s
a= V/t = 5,5 [m/s] / 5s = 1,1 [m/s²]
S = at²/2 = 1,1 [m/s²] × (5s)² / 2 = 13,75 m
t= 5[s]
s= 20[km/h]
Szukane:
V= ?
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V=s/t
V= 20[km/h] / 5[s]
V= 4 [km/h]
ODP.Ciało przebyło droge 4[km/h].