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v = 72 Km/jam, maka 20 m/s
Dit : Ek ?
Jawab : Ek = 1/2mv²
Ek = 1/2 600. (20)²
Ek = 300. 400 J
Ek = 120.000
Ek = 120 Kj
Mohon dikoreksi jika terdapat kesalahan.
Jazakallahu khair.
Arigatou gozaimasu.