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    Hi! I'm trying to use Newton's Law of Gravitation to find out the mass of Jupiter.

    g=GMm/r²

    The only information I have been given is:

    G = 6.67 * 10^-11
    g = 27 Nkg^-1
    Radius of Jupiter = 704 * 10^6

    Do I use the Sun to try and work this out? :confused:

    Thank you!
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    (Original post by Abblecrumble)
    Hi! I'm trying to use Newton's Law of Gravitation to find out the mass of Jupiter.

    g=GMm/r²

    The only information I have been given is:

    G = 6.67 * 10^-11
    g = 27 Nkg^-1
    Radius of Jupiter = 704 * 10^6

    Do I use the Sun to try and work this out? :confused:

    Thank you!
    F=GMm/r2 the unit for F is Newtons.
    The radius of Jupiter you've been given is incorrect (assuming that's metres) https://www.google.co.uk/search?q=ra...ient=firefox-a
    You could use any object you like to work this out, but I'm not sure that the question being posed is correct...
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    (Original post by Abblecrumble)
    Hi! I'm trying to use Newton's Law of Gravitation to find out the mass of Jupiter.

    g=GMm/r²

    The only information I have been given is:

    G = 6.67 * 10^-11
    g = 27 Nkg^-1
    Radius of Jupiter = 704 * 10^6

    Do I use the Sun to try and work this out? :confused:

    Thank you!
    Careful there, F = \frac{GMm}{r^2} and g = \frac{F}{m} = \frac{GM}{r^2}.

    You do not need another object to work out the mass of Jupiter from the information given because the gravitational field strength g only depends on the mass of Jupiter and the distance from its centre of gravity.

    And yeah, that radius is a bit big. It should be more like 7 \times 10^7 metres.
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    Yes, there was a mistake with the radius! I've solved it now. Thanks for your help.
 
 
 
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