A women on the deck of a ship anchored in the ocean observes that the crests of passing waves are `11m` apart and that the crest hits the bow of the ship every `3.0s`. Calculate the velocity of the waves.
Strategy: According to Eq. we can calculate the velocity `u`, provided the values of wavelength `lambda` and frequency `v` of the waves are known.

Explanation

Step `I:` Find the wavelength and frequency of the waves:
`lambda =` Distance between successive crests
`=11 m`
`v =` Number of crests that pass a fixed point (e.g., bow of the ship) per second
`=(1)/(3.0)s^(-1)`
Step `2:` Multiply the wavelength and frequecny to calculate the velocity `v:`
`u = lambdav`
`=(11 m) ((1)/(3.0)s^(-1))`
`= 3.7ms^(-1)`