00:01
16 .90, so we've got a transverse wave, we're told its wavelength, is moving in the positive direction of an x -axis, and we're shown its transverse velocity as a function of time.
00:16
So we want to find the wave speed, its amplitude, its frequency, and then sketch it.
00:22
And this is one of those problems where they sort of gave us the parts out of order, because first we'd like to find the frequency.
00:28
We can see that the period is four seconds, so the frequency, which is just the inverse of the order, the period is 0 .25 seconds, hurts.
00:54
So now we can go back and find the wavelength, or the speed.
01:00
It's the product of the frequency and the wavelength.
01:04
Now that we know both of those, we can see that the speed is five centimeters per second.
01:16
We want to find the amplitude.
01:19
So the maximum transverse speed is five centimeters per second.
01:32
And we know this is equal to the amplitudes...