What is the wave speed?

Question

For a certain transverse wave, the distance between two successive maxima is 1.2 m and eight maxima pass a given point along the direction of travel every 6.01 s.

Calculate the wave speed.

Answer in units of m/s.

Answer 1

Think about one particular maximum, at the given point at t=0.

And how that will move.

In the next 6.01, 8 maxima will pass the given point. That means the particular maximum must move 8 x 1.2m in 6.01 s

So the wave speed in m/s = (8 x 1.2) / 6.01