Results 1 to 3 of 3

Math Help - Inverse Variation

  1. #1
    Newbie
    Joined
    Mar 2012
    From
    Ohio
    Posts
    3

    Exclamation Inverse Variation

    Solved! Answer: 128 pounds.

    This problem was easily solved : ((4000^2)x200) / (5000^2)=128
    Notes:
    Original Problem ( simplified ) : The weight of a man is 200 pounds 4000 miles ( surface ) from the center of the earth, how much does he weigh 1000 miles above the surface.
    Last edited by exerpt; March 8th 2012 at 04:54 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,623
    Thanks
    428

    re: Inverse Variation

    Quote Originally Posted by exerpt View Post
    The Weight of a body varies inversely as the square of its distance from the center of the earth. If the radius of the Earth is 4000 miles long, how much would a 200lb. man weigh 1000 miles above the surface?
    the statement above translated into an equation ...

    W = \frac{k}{d^2}

    where W = weight, d = distance, and k = the constant of proportionality

    use your Earth surface info ( W = 200 , d = 4000) to solve for k, then determine W at d = 4200
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Mar 2012
    From
    Ohio
    Posts
    3

    re: Inverse Variation

    Thanks for the quick reply, helps quite a bit
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Inverse Variation
    Posted in the Algebra Forum
    Replies: 3
    Last Post: June 3rd 2010, 05:45 AM
  2. Inverse Variation
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: November 18th 2008, 03:38 PM
  3. what is inverse variation
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: May 15th 2008, 04:24 AM
  4. inverse variation
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: March 13th 2008, 10:58 AM
  5. Inverse variation
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: June 12th 2005, 11:22 AM

Search Tags


/mathhelpforum @mathhelpforum