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t=2
f=n/t=½
kecepatan sudut= 2πf = 2π. ½= π rad/s
t=2 sekon dalam 1 putaran
dit: ω=?
jwb:
cari periode dahulu
T=t/banyak putaran
T=2/1
T=2 sekon
baru cari kecepatan sudut:
ω=2π/T
ω=2π/2
ω=π rad/s (C)