How many waves pass a point in 1 minute given wavelength and speed?

[BarCode]

Homework Statement

The wavelength of a water wave is 8.0m and its speed is 2.0m/s. How many waves will pass a pixed point in the water in 1.0min?

Homework Equations

V =f(lambda)

The Attempt at a Solution

As far as I got was that 1.0 min = 60 seconds. From there, I am totally lost.

 

[Kurdt]

Frequency measures the number of waves that pass a fixed point per unit time. Does that help any?

 

[BarCode]

F = 1/T, which is all I know.

 

[Kurdt]

Well if you can work out the frequency which tells you how many waves pass a point per second then you can use that to work out how many waves pass in a certain number of seconds.

 

[BarCode]

I get confused as to how to know which number to use for the denominator.

 

[Kurdt]

What is the frequency first of all?

 

[BarCode]

F = 1/T
T = P = 8.0m / 2.0s = 4s

F = 1/4

 

[Kurdt]

so if one quarter of a wave passes a fixed point every second, how many pass that fixed point in 60 seconds?

 

[BarCode]

60/4
= 15 waves in 60 seconds.

 

[Kurdt]

That looks fine to me.