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Posted by **Rody** on Tuesday, January 11, 2011 at 11:58am.

y = 5.35 / [4.95 + (6.55x+2.15 t )2]

where y and x are in cm, and t is in seconds.a) What is the maximum displacement of the wave at t = 4.30 s ?

b)What is the wave velocity?

- Physics -
**drwls**, Tuesday, January 11, 2011 at 1:39pma) Plug in t = 4.3 s and you get

y = 5.35/[4.95 + (6.55x+9.245)^2]

The maximum displacement is where the denominator is zero, and is

ymax = 5.35/4.95 = 1.08

b) The crest of the wave moves such that 6.55 x +2.15t remains zero

dx/dt = wave speed = -2.15/6.55

= -0.328 cm/s

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