Odpowiedź:
s=at*2/2
2s=at*2
t=√2s/a
t=√2x5/10
t=√1s
t=1s
Ek=Ep
mv*2/2=mgh
v*2=2gh
v=√2gh
v=√2x10x5
v=10m/s
dla h=45 m
t=√2x45/10
t=3s
v=√2x10x45
v=30m/s
Chyba dobrze
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Odpowiedź:
s=at*2/2
2s=at*2
t=√2s/a
t=√2x5/10
t=√1s
t=1s
Ek=Ep
mv*2/2=mgh
v*2=2gh
v=√2gh
v=√2x10x5
v=10m/s
dla h=45 m
t=√2s/a
t=√2x45/10
t=3s
v=√2gh
v=√2x10x45
v=30m/s
Chyba dobrze
Wyjaśnienie: