Ep=Ek
mgh=(mV^2)2
v=pier z 2gh
v=pier z 2x9,81x25= w przybliżeniu 22m/s
s= at2/2
25= 10t2/2
t2=5
t=pier 5 = ok.2.36
v=g*t
v=10*2.36
v=22.36=22 m/s
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Ep=Ek
mgh=(mV^2)2
v=pier z 2gh
v=pier z 2x9,81x25= w przybliżeniu 22m/s
s= at2/2
25= 10t2/2
t2=5
t=pier 5 = ok.2.36
v=g*t
v=10*2.36
v=22.36=22 m/s