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Different ways to calculate force, GPE

  1. Jan 31, 2009 #1
    Different ways to calculate force, GPE......

    1. The problem statement, all variables and given/known data

    Different ways to calculate force,mass,Gravational Potienal Energy,seperation distance

    2. Relevant equations



    3. The attempt at a solution
    Not sure how to find new ways to calculare these other than the already known formulas like
    G(m1)(m2)/r^2
     
  2. jcsd
  3. Jan 31, 2009 #2
    Re: Different ways to calculate force, GPE......

    We shall be glad if you state clearly what exactly you want.
     
  4. Feb 3, 2009 #3
    Re: Different ways to calculate force, GPE......

    I want to know a diffrenet formula that can be used to caluclate those things

    Different ways to calculate force,mass,Gravational Potienal Energy,seperation distance
     
  5. Feb 3, 2009 #4
    Re: Different ways to calculate force, GPE......

    Well, all of these can be found many ways, and it's kind of unclear what you want.

    For example:
    [tex]\Sigma F = ma[/tex] gets you the force if you have mass and acceleration.
    Fg=mg gives you the force on an object due to gravity.
    [tex]E=\frac{k q_1 q_2}{r^2}[/tex] gives you the electric field (which is a force)
    [tex]F_g=\frac{g M m}{r^2}[/tex] is the general force of gravity.
    and there are many more.

    Mass can be calculated from lots of things, assuming you know other variables--kinetic energy, certain potential energies, certain forces, net force, etc.

    GPE can be found using the generic equation [tex]U_g=-\frac{g M m}{r}[/tex], by total energy minus everything that's not GPE, Ug=mgh, integrating force, etc

    Separation distance (if I am interpreting it correctly) can be found by knowing the result of most of the equations I have already listed and solving for r and other ways.
     
    Last edited: Feb 3, 2009
  6. Feb 5, 2009 #5
    Re: Different ways to calculate force, GPE......

    thanks, sorry im also a little unclear withe question is as well it wants to know new ways to calculate all those things thats all it says but thanks for the help
     
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