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v=12m/s
h=?
g=10m/s²
mgh=mv²/2 /:m
gh=v²/2 /:g
h=v²/2g
h=( 12m/s)²/2*10m/s²
h= 144 m²/s² /20m/s²
h=7,2 m
h=gt²/2
2h=gt²
t²=2h/g
t=√2h/g
t=√2*7,2 m /10m/s²
t=√14,4 m /10m/s²
t=√1,44 s²
t=1,2 s
g=10m/s²
g=ΔV/t
t=ΔV/g
t=12/10
t=1,2s
h=1/2*gt²
h=1/2*10*1,44
h=7,2m