text: # Help on Gravity stuff
  
  ## Homework Statement
  
  Use Newton's law of universal gravitation to find an equation where x is equal to an object's distance from Earth's center, and y is its acceleration due to gravity. Use a graphing calculator to graph this equation, using 6400-6600 km as the range for x and 9-10 m/s2 as the range for y. The equation should be of the form y = c(1/x2).
  (a) Trace along this graph and find y at sea level, 6400 km.
  
  (b) Trace along this graph and find y on top of Mt. Everest, 6410 km.
  
  (c) Trace along this graph and find y in a typical satellite orbit, 6500 km.
  
  (d) Trace along this graph and find y in a much higher orbit, 6600 km.
  
  i got no idea how to solve any help or the answers would help greatly
  
  For a start you could read
  http://csep10.phys.utk.edu/astr161/lect/history/newtongrav.html
  
  G= universal gravitational constant
  M = mass of earth (a constant)
  m = mass of your object (a constant)
  g = gravitational acceleration experienced by the object (a variable)
  r = distance of object from the centre of the Earth (a variable)
  
  G*M*m/r*r = m*g
  
  << complete solution deleted by berkeman >>
  
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