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dit : V2 = ...???
jawab :
*) cari ω2 nya dulu :
ω1.n1 = ω2.n2
2000.(3,5.n2) = ω2.n2
ω2 = 7.000 rpm
**) baru cari V2 nya :
V2 = (ω2 : ω1) x V1 = (7.000 : 2.000) x 4 = 14 m/s (jawab : E)