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dik: v1 = v2 = 36 km/jam
m1 = 3
m2 = 1
ek2 = 360 joule
dit: ek =.....?
jwb: ek1 / ek2 = m1.v1 / m2.v2
ek1 / 360 = 3.36 / 1.36
ek1 / 360 = 3 / 1
ek1 = 1080