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v= 20 m/s
m= 10 kg
Dit:
Ek=..?
Penye:
Ek= ×m×v²
Ek= ×10×20²
Ek= ×10×400
Ek= 2000 J
Jawabannya adalah yang A
1/2 .10.20 kuadrat
5.400
2000 j