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= 1/2 . 9 kg . (300 m/s)²
= 1/2 . 9 kg . 90.000 m/s²
= 1/2 . 810.000 m/s²
Ek = 405.000 m/s²
v : 300 m/s
dit : Ek ?
Ek = 1/2 m.v*2 (V pangkat 2)
1/2 9. 300*2
1/2.9.90000
9. 45000
Ek = 405000 joule