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◾ Materi : Usaha dan Energi◾ Sub materi : Energi
◾ Mapel : Fisika
Diketahui :
a = 2 m/s²
Vo = 3 m/s
t = 6 s
m = 4 kg
Ditanya :
Ek = ?
Penyelesaian :
*Cari kecepatan benda setelah 6 sekon
Vt = Vo + at
Vt = 3 + 2(6)
Vt = 3 + 12
Vt = 15 m/s
*Cari energi kinetik benda
Ek = ½mv²
Ek = ½(4)(15)²
Ek = 450 J
Jadi, energi kinetik benda adalah 450 J
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