試題詳解

9. The displacement of a string carrying a traveling sinusoidal wave is given by y(x,t) = (kx – wt – φ). At time t = 0 the point at x = 0 has velocity v₀ and displacement y₀. The phase constant φ is given by tan
(A) ν₀/ωγ₀
(B)ων₀/γ₀
(C) wy₀/v₀
(D) y₀/ων0
(E) 0.