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Verified answer
◾ Materi : Usaha dan Energi◾ Sub materi : Energi
◾ Mapel : Fisika
Diketahui :
EK1 = 5000 J
V2 = ½V1
Ditanya :
Ek2 = ?
Penyelesaian :
Ek = ½mv²
Ek/v² = ½m
Ek1/v1² = Ek2/v2²
5000/v1² = Ek2/(½v1)²
5000/v1² = Ek2/¼v1²
5000 = Ek2/¼
Ek2 = 5000(¼)
Ek2 = 1250 J
Jadi, energi kinetiknya sekarang adalah 1250J
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-vin