Yeah I'm probably going to assume that there's a mistake in the book, u is the coefficient of friction, this equation is the given equation of kinetic energy = work where the force is the force of friction.
Homework Statement
I have to prove some formula, I got stuck in the process.
Homework Equations
Formula to prove:
v_{0} = \frac{M+m}{m}\sqrt{2gus}
Valid equation that should get me to this formula:
\frac{m^2v_{0}^2}{2(M+m)} = gmus
The Attempt at a Solution
v_{0}^2=\frac{2(M+m)}{m^2}gmus...
Ok here's how I did it:
f=f_{s}\frac{v}{v-v_{s}}
I multiplied this by: (v-v_{s}) \Rightarrow f(v-v_{s})=f_{s}v
Then I divided by F and subtracted v
-v_{s}=\frac{f_{s}v}{f}-v
Finally I multiplied by the negative sign, that's my result:
v_{s}=\frac{-f_{s}v}{f}+v
I know they both are equal...
Homework Statement
I have this Doppler effect formula, but I don't know how it was derived, I can't repeat the process myself to solve for speed of the source, I would really appreciate if someone could mathematicly solve this in steps, thank you very much.
Homework Equations...