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Homework Help: Mass of earth to use in calculation?

  1. Mar 30, 2008 #1
    If the mass of the earth = 5.9742 × 1024 kilograms
    how do you use this in a calculation?

    When trying to solve for gravitational force exerted between two objects, you need a M1 & M2. If the M2 is the mass of earth, how do you solve it?

    M1 = 48.5 kg
    M2 = 5.9742 × 1024 kg
    distance between objects (r) = 11712.137

    I have the numbers, but don't know what to do with the "earth mass".
  2. jcsd
  3. Mar 30, 2008 #2
    plug into the formula:


    simple as that.
  4. Mar 31, 2008 #3
    for Earth's mass: 5.9742 × 10^24

    you need to type into your calculator 5.9742 Exp 24

    i.e type 5.9742
    then the button marked 'Exp'
    then enter 24

    You should then see the number displayed on the calculator screen something like this 5.9742__24
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