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Wylicz jaką droge przebył w ciągu 4s ruchu, a jaką w 4sek. tego ruchu.
t=4s
v=8m/s
szukane:
S=?
S4=?
S=at²/2
a=v/t
a=8m/s:4s
a=2m/s²
S=2m/s²*(4s)²/2
S=2m/s²*16s²/2
s=16m
S4=16m-2m/s²*(3s)²/2
S4=16m-2m/s²*9s²/2
S4=16m-9m
S4=7m