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Homework Help: Force of Gravity/Friction Question

  1. Apr 27, 2010 #1
    1. The problem statement, all variables and given/known data
    Hey, I'm new to the forum. I have taken introductory Physic, but missed the first month of class due to serious personal issues. Anyways here's my question:

    Determine the weight of a 50kg object on the surface of the moon(Do not use g=1.63N/kg)

    Mm(Moon)=7.4x10 to the power of 22kg


    2. Relevant equations
    Fg=Mg?




    3. The attempt at a solution
    Like I said, I am pretty lost, but I've come up with this so far:
    Fg=Mg
    Fg=(7.4x10 to the power of 22kg)(50kg)
    I wouldn't be surprised if I was way off, but I've tried a few formulas and have been way off.

    Thanks!
     
  2. jcsd
  3. Apr 28, 2010 #2

    rock.freak667

    User Avatar
    Homework Helper

    While this is correct, you are using your M and g incorrectly.


    The weight of an object on a planet, is nothing but the gravitational force of attraction between the mass and the planet.

    So how do you find the force of attraction between two masses? (Hint: Newton's law of gravitation)
     
  4. Apr 28, 2010 #3
    If this is early introductory physics surely thats all the lecturer/teacher wants..
     
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