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Ep max = 200 J
ditanyakan :
Ek saat 1/2 h = ?
jawab ;
Ep = m g h
200 = m g h
h = 200/mg
E awal = E akhir
Ep max = Ep + Ek
m g h = m g h2 + Ek
200 = mg 1/2 h + Ek
200 = mg x 1/2 x 200/mg + Ek
200 = 100 + EK
Ek = 100 J
Ek= 1/2.Ep
Ek= 1/2.200
Ek= 100 J