physics

posted by .

A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 14% of his body weight?

i don't even know where to start with this question... i need help!

  • physics -

    .86 = Rearth^2/r^2

    because
    W = G m M/R^2
    and G m M does not change
    remember that they really ask for
    r-Rearth
    the distance above ground, not the bigger radius from earth center

  • physics -

    could try and explain more in depth? like wat does W stand for? his weight? and i don't really get how your solving it..

  • physics -

    F=(G*m1*m2)/r^2
    F- force
    G- gravitational constant
    m1- mass on earth
    m2- mass of object
    r- radius on earth plus given distance over it

    .86*686=589.96 to find final force
    plug in everything..
    589.96=(6.67*10^-11*70*5.98*10^24)/ (h+6,370,000)^2
    Solve for h!

    h=509411
    =]

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 14% of his body weight?
  2. physics

    A 80 kg man weighs 784 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
  3. earth

    A particle weighs 120 N on the surface of the earth. At what height above the earth's surface will its weight be 30 N?
  4. Algebra II

    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 mi, how much would a 200 lb man weigh 1000 mi above the surface of the earth?
  5. Physics

    A man has a mass of 80kg on the Earth's surface. Part A How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?
  6. algebra

    the weight of a body above the surface of earth varies inversely with the square of the distance from the center of the earth. if maria weighs 125 pounds when she is on the surface of the earth(3960 miles from the center),determine …
  7. algebra

    the weight of a body above the surface of earth varies inversely with the square of the distance from the center of the earth. if maria weighs 125 pounds when she is on the surface of the earth(3960 miles from the center),determine …
  8. Math - Algebra

    If a man wewighs 41 newtons (N) on the surface of the earth while he weighs 81.5N on the surface of the moon, approximately how much lighter is he on the moon?
  9. Physics

    A man has a mass of 65kg on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?
  10. phsics

    A 75 kg man weighs 735 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?

More Similar Questions