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m= 8 ton= 8.000 kg
kelajuan= 72 km/jam= .....m/s
72 × 1.000 : 3.600
72.000 : 3.600
20 m/s
Ditanya :
Ek ?
Jawab :
Ek= 1/2 × m × v²
Ek= 1/2 × 8.000 × 20²
Ek= 4.000 × 400
Ek= 1.600.000 J
m = 8 ton = 8.000 kg
v = 72 km/jam = 20 m/s
- Ditanya : Ek
- Penyelesaian :
Ek = 1/2 × m × v²
= 1/2 × 8.000 × 20²
= 1.600.000 Joule atau 1.600 kJ