ile czasu trwa sapdanie jabłka z wysokości 5 m (spadek swobodny).
a=s/t^2
t^2=s/a
t^2=5/10
t^2=1/2
t=pierwiastek z 2 nad 2 s
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a=s/t^2
t^2=s/a
t^2=5/10
t^2=1/2
t=pierwiastek z 2 nad 2 s