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m= 5 ton= 5.000 kg
kecepatan (v)= 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 × 5.000 × 20²
Ek= 2.500 × 400
Ek= 1.000.000 J
m = 5 ton = 5000 kg
v = 72km/jam = 72 x 1000 / 3600 = 20m/s
Ek =
Ek =