Ep= mgh= 0,5*10*3= 15 Дж
Ek= mV^2 / 2= 0,5*36/ 2=9
A= 15-9= 6 Дж
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Ep= mgh= 0,5*10*3= 15 Дж
Ek= mV^2 / 2= 0,5*36/ 2=9
A= 15-9= 6 Дж