Odpowiedź:
v1=72km/h
v2=31m/s=111,6km/h
t=1h
v=s/t
s=v*t
s1=1h*72km/h
s1=72km
s2=1h*111,6km/h
s=s1+s2
s=72km+111,6km
s=183,6km
vśr=183,6km/2h
vśr=91,8km/h
2)
v1=18km/h=5m/s
v2=23m/s
s=1300m
Δv=(23-5)m/s=18m/s
s=Δv*t/2
t=2s/Δv
t=2*1300m/18m/s
t=144,4s
a=Δv/t
a=18m/s /144,4s
a=0,12m/s²
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Odpowiedź:
v1=72km/h
v2=31m/s=111,6km/h
t=1h
v=s/t
s=v*t
s1=1h*72km/h
s1=72km
s2=1h*111,6km/h
s=s1+s2
s=72km+111,6km
s=183,6km
vśr=183,6km/2h
vśr=91,8km/h
2)
v1=18km/h=5m/s
v2=23m/s
s=1300m
Δv=(23-5)m/s=18m/s
s=Δv*t/2
t=2s/Δv
t=2*1300m/18m/s
t=144,4s
a=Δv/t
a=18m/s /144,4s
a=0,12m/s²