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Verified answer
Usaha Dan Energi- Energi Kinetik
Ek = 3000 J
v = 50 m/s , bukan m/s² !
m = _ ?
Ek = ½ m v²
m = 2 Ek / v²
m = 2 × 3000 / 50²
m = 2,4 kg
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