y = 0.15 cos(pi x - 15 pi t)
at y = 0.12 ;
0.12 = 0.15 cos@
@ = 36.87 deg
Vy = 0.15 x 15 pi sin (pi x - 15 pi t)
= 0.15 x 15 pi x sin@
= 4.24 m/s
Vmax = 0.15 x 15 pi = 7.065 m/s
Vavg = 0 ... because wave
V = wavelength / T
but wavelength = 2 and T = 2/15 ... comparing with standard eqn
V = 2/(2/15) = 15 m/s
No comparison. wave speed is constant. Transverse speed changes with time and position
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