In summary, the conversation is about solving for Vw using the formula for the Doppler effect. The speaker is having trouble with their calculations and asks for help. Another person points out a mistake in the second step and suggests simplifying the equation to solve for Vw.
#1
XxphysicsxX
22
0
The problem:
I have to answer a question about the Doppler effect using the formula attached.
I know i have to solve for Vw, but I get
Vw/Vw=(Fd/Fs)(-Fs)
and I am possitive that's not right, can someone please help me out??
Thankyou
Fd (Vw- Vs) = VwFs Fd( Vw-Vs) - Vw= Fs
but the two Vw just cancel each other out again..
I don't know what I am doing wrong...
The second step is wrong.
Fd(Vw - Vs) = VwFs
FdVw - FdVs = VwFs
In the multiplication you cannot transfer a single term to the other side.
Now collect the terms containing vw on one side and find its expression.
#5
AC130Nav
156
0
XxphysicsxX said:
The problem:
I have to answer a question about the Doppler effect using the formula attached.
I know i have to solve for Vw, but I get
Vw/Vw=(Fd/Fs)(-Fs)
and I am positive that's not right, can someone please help me out??
Thankyou
Given Fd = [Vw/(Vw-Vs)]Fs then
(Vw-Vs)/Vw = Fs/Fd
Simplify the lefthand term to get Vw by itself and continue.
