Recent content by clearlyjunk

  1. C

    Ive got a gravitational Potential Energy Question

    HEre is the page! http://img190.imageshack.us/i/backofgravitationalpote.jpg/ Homework Statement http://img190.imageshack.us/i/backofgravitationalpote.jpg/ Qeustions at that pg 1.Examine teh graph 2.Calculate the change in potential of a 25 kg mass which is placed into orbit 520 km...
  2. C

    Gravitational Potential Energy deltaEg=(GMm/r1)-(GMm/r2)

    Im not talking about eg=mgh.. I am talking about deltaEg=(GMm/r1)-(GMm/r2) My question is how is it possible to say that in General , Eg=(-GMm/r) and why does Eg not equal 0 when r -> infinity Thanks please reply quickly :)
    • clearlyjunk
    • Thread
    • Energy Gravitational Gravitational potential Gravitational potential energy Potential Potential energy
    • Replies: 2
    • Forum: Mechanics
  3. C

    Trignometric identiy (LOADS o HELP ;D )

    Homework Statement sin(pi +A) sec(pi-A) --------- + ---------- = 0 cos (2pi + A) csc(2pi-A) Homework Equations cscx=1/sinx secx=1/cosx sin(x+y)=sinxcosy+cosxsiny sin(x-y)=sinxcosy-cosxsiny cos(x+y)= cosxcosy-sinxsiny cos(x-y)= cosxcosy+sinxsiny...
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