Z h=20 m spada swobodnie piłka tenisowa.Z jaka predkoscia i po jakim czasie uderzy w ziemie?
h=20m
g=10m/s2
Ep=Ek
mgh=mv2/2
gh=v2/2
10m/s2*20m=v2/2
200m2/s2=v2/2
400m2/s2=v2
v= 20m/s
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h=20m
g=10m/s2
Ep=Ek
mgh=mv2/2
gh=v2/2
10m/s2*20m=v2/2
200m2/s2=v2/2
400m2/s2=v2
v= 20m/s