Resposta :
Ec = m . v² : 2
Ep = m . g . h
4) d) 900J
Ec = 2 . 30² : 2
Ec = 900J
5) a) 60J
Ep = 2 . 3 . 10
Ep = 60J
[tex]\Large \text {$ \sf 4) \dfrac {} {}$}\\\Large \text {$ \sf Ec = \dfrac {m.v^{2} } {2}$}\\[/tex]
[tex]\Large \text {$ \sf Ec = \dfrac {2.30^{2} } {2}$}\\[/tex]
[tex]\Large \text {$ \sf Ec = 900 J \dfrac {} {}$}\\[/tex]
[tex]\mathsf{=> ALTERNATIVA }[/tex] [tex]\mathsf{D}[/tex]
[tex]\Large \text {$ \sf 5) \dfrac {} {}$}\\\Large \text {$ \sf Ep = mgh \dfrac {} {}$}\\\Large \text {$ \sf Ep = 2.10.3 \dfrac {} {}$}\\\Large \text {$ \sf Ep = 60 J \dfrac {} {}$}[/tex]
[tex]\mathsf{=> ALTERNATIVA}[/tex] [tex]\mathsf{A}[/tex]