Question

Oblicz :
1. v=10 m/s
s=1500 m
t=?

2. v=20 m/s
t= 45 mm
s= ?

3. v= 80 km/h
t= 15 mm
s= ?

4. v= 72 km/h
s=500mm
t=?

5. v = 90 km/h
s= 30000m
t=?

Answer 1

1)s=1500m
V=10m/s

V=s/t
t=s/V

t=1500m/10m/s=150s(=2,5min)

2)
V=20m/s
t=45min(?) (chyba chodzi o minuty?) = 45*60s=2700s

V=s/t
s=V*T

s=2700s*20m/s=54000m=54km

3)
v=80km/h
t=15min=0,25h

V=s/t
s=V*t

s=80km/h*0,25h=20km

4)V=72km/h=72*1000m/3600s=20m/s
s=500mm(milimetrów ?)=50cm=0,5m

V=s/t
t=s/V

t=0,5m/20m/s=0,025s

A jeśli to miały być metry to:
V=72km/h=72*1000m/3600s=20m/s
s=500m

V=s/t
t=s/V

t=500m/20m/s=25s

W razie pytań, pisz.