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1
Ec = ------ . m . v²
2
m= 5 kg
Ec= 225 j
v= ??
2(Ec)
V² = ---------------
m
v² = 2 . 225 / 5
v² = 450 / 5
v² = 90
v = 3√10 m/s -> que es lo mismo que = 9,4... m/s