1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Problem with equation / proving formula

  1. Apr 25, 2016 #1
    1. The problem statement, all variables and given/known data
    I have to prove some formula, I got stuck in the process.

    2. Relevant equations
    Formula to prove:
    [tex]v_{0} = \frac{M+m}{m}\sqrt{2gus}[/tex]
    Valid equation that should get me to this formula:
    [tex]\frac{m^2v_{0}^2}{2(M+m)} = gmus[/tex]

    3. The attempt at a solution
    [tex]v_{0}^2 = \frac{M+m}{m}2gus[/tex]
    [tex]v_{0} = \sqrt{\frac{M+m}{m}2gus}[/tex]

    I'm pretty sure my math has failed me here, that right handside of the equation seems fishy, or maybe book did a mistake?
    Last edited: Apr 25, 2016
  2. jcsd
  3. Apr 25, 2016 #2
    You seem to be correct may be there is a mistake in the book, what is u?
  4. Apr 25, 2016 #3
    Yeah I'm probably gonna 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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted