z jakiej wysokosci spadło swobodnie cialo jezeli tuz przed uderzeniem o ziemie mialo predkosc 30 m/s2
vkońcowe=30m/s
v=at
30m/s=10m/s2·t
t=3s
s=1/2at2
s=1/2·10m/s2·(3s)2
s=5m/s2·9s2
s=45m
hmax=g*tc^2 /2vk=g*tc=>tc=vk/g=30: 10=3[s]hmax=10*3^2 /2=10*9/2=45[m]
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vkońcowe=30m/s
v=at
30m/s=10m/s2·t
t=3s
s=1/2at2
s=1/2·10m/s2·(3s)2
s=5m/s2·9s2
s=45m
hmax=g*tc^2 /2
vk=g*tc=>tc=vk/g=30: 10=3[s]
hmax=10*3^2 /2=10*9/2=45[m]