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V = 72 km/jam
m = 2 ton = 2.000 kg
dit : Ek ?
dijwab :
V = (72x1000)/3.600
= 72.000/3.600
= 20 m/s
Ek = 1/2 m x v²
= 1/2 x 2.000 x 20²
= 1/2 x 2000 x 400
= 400.000 J
= 400 KJ
v=72 km/j= 20 m/s
m=2000 kg
Ditanya:
Ek=....?
Jawab:
Ek= 1/2 m.
Ek= 1/2 2000 kg 20.20 m2/s2
Ek=400.000 J