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y= A sin (ωt + kx)
y= 5 sin (10πt + πx) Jadi secara mudah 10π=ω dan π=k
kemudian, perhatikan
10π=ω
10π= 2πf
5=f
jadi f =5
begitu pula perhatikan
π=k
π=
=
= 2 cm (ingat disini satuannya masih cm)
Kemudian kecepatan
v=λ*f = 2 * 5 = 10 cm/s selesai