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m= 1.000 kg
v= 4 m/s
ditanya
Ek=...?
jawab
Ek= 1/2.mv²
Ek= 1/2 × 1.000 × 4²
Ek= 1/2 × 1.000 × 16
Ek= 8.000 Joule
=1/2. 1000.4²
=8.000