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v1 = 36 km/jam
v2 = 72 km/jam
Dit: Ek1 banding Ek2?
Penyelesaian: Ek1 : Ek2
1/2*m*v1^ : 1/2*m*v2^
v1^ : v2^
36^ : 72^
1296 : 5184
1 : 4
Jawabannya 1 : 4