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Un corp are energia cinetica de 16 KJ.Calculati masa corpului daca are o viteza constanta de 10 m/s.
Ajutorrr,plssss


Răspuns :

Ec=(m*v^2)/2
Ec=16 kJ=16000 J
Ec=(m*v^2)/2 <=>16000=(m*10^2)/2<=>16000=100 m/2<=>16000=50 m=>m=16000/50=1600/5=320 kg