Problem with equation / proving formula

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SUMMARY

The discussion centers on proving the formula v_{0} = \frac{M+m}{m}\sqrt{2gus} and identifying potential errors in the derivation process. The participant attempts to manipulate the equation \frac{m^2v_{0}^2}{2(M+m)} = gmus, leading to v_{0}^2=\frac{2(M+m)}{m^2}gmus and v_{0}^2 = \frac{M+m}{m}2gus. The participant expresses doubt about the accuracy of their calculations and suggests the possibility of an error in the source material, particularly regarding the variable 'u', which represents the coefficient of friction in the context of kinetic energy and work.

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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
v_{0}^2 = \frac{M+m}{m}2gus
v_{0} = \sqrt{\frac{M+m}{m}2gus}

I'm pretty sure my math has failed me here, that right handside of the equation seems fishy, or maybe book did a mistake?
 
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You seem to be correct may be there is a mistake in the book, what is u?
 
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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.
 

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