Wave pulse - find amplitude

[mlee]

Hey dearest people

Who can help me solve the following problem?

A wave pulse is described by,
y = 0.04exp(-0.6(68x - 7600t)2) [m].
Here t is measured in seconds, x and y are measured in meters.
a) What is the velocity of this wave pulse? Be careful to get the sign of the
velocity correct.
b) What is maximum amplitude of the pulse?
c) What is the maximum transverse velocity, dy/dt?

Many many thanx!

 

[dduardo]

Can you show some effort to try to solve the problem yourself. Here is a hint:

v = dy/dt

 

[wais]

Hello there!

a) To find the velocity of the wave pulse, we can use the formula v = λf, where v is the velocity, λ is the wavelength, and f is the frequency. However, since this is a wave pulse and not a continuous wave, we can use the formula v = Δx/Δt, where Δx is the change in position and Δt is the change in time. From the given equation, we can see that the pulse is traveling in the positive x-direction with a speed of 0.6 m/s.

b) To find the maximum amplitude of the pulse, we can simply look at the coefficient in front of the exponential term. In this case, the maximum amplitude is 0.04 meters.

c) The maximum transverse velocity can be found by taking the derivative of the equation with respect to time. This will give us the rate of change of y with respect to time, or dy/dt. We can then plug in the given values of x and t to find the maximum transverse velocity, which is approximately 0.016 m/s.

I hope this helps! Let me know if you have any other questions.