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m = 0,02 kg
v = 200 m/s
dit : Ek ?
Ek = 1/2 x m x v²
= 1/2 x 0,02 x (200)²
= 400 J
2
= 1 × 2 × 200 × 200
2 100
= 80.000
200
= 400 Joule
thanks, semoga membantu ......... :D