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Newtons G

  1. Oct 10, 2005 #1
    I don't know how to do this, 2 Cokes standing 35 cm from eachother, Calculate the attraction to eachother. One can weights 365grams.

    Ok I know we should use G*m1m2/r1 and I have tried that and the result becomes only wrong like this

    0,365*0,365 / 0,35 =0,3806428571 * 6,67*10^-11 =2,53888786^-11:eek:

    Well that's not right the answer should be 7,3*10^-11:surprised :surprised
     
  2. jcsd
  3. Oct 10, 2005 #2

    Doc Al

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    Staff: Mentor

    That should be:
    [tex]\frac{G m_1 m_2}{r^2}[/tex]
     
  4. Oct 10, 2005 #3
    thx for that much easier now
     
  5. Oct 10, 2005 #4
    Got another one here too, The Electron in the Hydrogenatom has a mediumdistans of 5*10^-11 Calculate the gravitationsforce on the electron from the protone in the middle. How shall i calculate this when I aint got the mass
     
  6. Oct 10, 2005 #5

    Doc Al

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    Staff: Mentor

    Look up the masses of the proton and electron!
     
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