Waves I - Problem #9

A sinusoidal wave moving along a string is shown twice in Fig. 16-33, as crest A travels in the positive direction of an x axis by distance d = 6.0 cm in 4.0 ms. The tick marks along the axis are separated by 10 cm; height H = 6.00 mm. The equation for the wave is in the form y(x, t) = ym*sin(kx +/- ωt), so what are (a) ym, (b) k, (c) ω, and (d) the correct choice of sign in front of ω? ... https://www.youtube.com/watch?v=JpRNCFk7QpE