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α=5π rad/s²
t=10 s
Dit: n=?
Dij:
Pertama kita cari kecepatan sudut (ω):
α=ω/t
ω=α.t
=5π rad/s².10s
=50π rad/s.
Lalu cari frekuensi:
ω=2πf
f=ω/2π
=50π/2π
=25 Hz
Baru cari deh banyaknya putaran(n):
f=n/t
n=f.t
=25.10
=250 putaran.