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Verified answer
m = 20 gr
v = 5 cm/s
Ek = __?
Energi kinetik
Ek = ½ m v²
Ek = ½ (20 gr) (5 cm/s)²
Ek = 250 erg ✓
Ek = 250×10⁻⁷ J
Ek = 250×10⁻⁷ × 10³ = 2,5×10⁻² mJ ✓
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