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V = Aω cos ωt
Ek =
=
=
=
=
Ep =
=
EM = EP + EK
=
=
=
Saat EK= 3EP
maka
EM = EP + EK
= EP + 3EP
EM= 4 EP
Coret variable yang sama antara ruas kira dan ruas kanan
A² = 4 Y²
Y² =
Y =
=
artinya saat simpangan = setengah dari amplitudonya.