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Ek = 2500 j
Ditan : v...?
Jawab :
Ek = 1/2 m v²
2500 = 1/2 . 0,02 . v²
2500 = 0,01 . v²
v² = 2500/0,01
v² = 250000
v =√250000
v = 500 m/s
jadi, kecepatan peluru tersebut adalah 500 m/s