Odpowiedź:
1)V=8m/s
t=0.5min=30s
s=?
s=V×t
s= 8m/s×30s=240m
2)
t=1.5min=90s
s=1800m
V=?
V=s/t
V=1800m/90s= 20m/s
4) 5×10=50
9m/s= 9+1km/1000/1/3600h= 9×1/1000km×3600h/1= 0.4km/h
54km/h= 54×1000m/3600s=15m/s
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Odpowiedź:
1)V=8m/s
t=0.5min=30s
s=?
s=V×t
s= 8m/s×30s=240m
2)
t=1.5min=90s
s=1800m
V=?
V=s/t
V=1800m/90s= 20m/s
4) 5×10=50
9m/s= 9+1km/1000/1/3600h= 9×1/1000km×3600h/1= 0.4km/h
54km/h= 54×1000m/3600s=15m/s
Wyjaśnienie: