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Epg=mgh
Epg=3kg*9,81m/s²*4m
Epg=117,7J
Y la energía cinética:
Debemos bucar la velocidad:
v=√2gh
v=√2*9,81m/s²*4m
v=8,86m/s
Ahora, sabemos que:
Ahora:
EM=Epg+Ek
EM=117,7J+117,7J
EM=235,4J