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Homework Help: Plz Help me in the solution of this problem

  1. Mar 2, 2005 #1
    Hi!

    Im getting confused in solving this problem. I just cant pick out the correct formulae to solve it.

    "At 45 degree latitude, the gravitational acceleration as a function of elevation "z" above sea level is given by

    g=a-bz

    where a=9.807 meter per second square and b=3.32x10^-6 s^-2.

    Determine the height above the sea level where the weight of an object will decrease by 1 percent."

    Thanks in advance
     
  2. jcsd
  3. Mar 2, 2005 #2

    dextercioby

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    What is the value of "g",the one dropped by 1%...?And what is the height...?

    Daniel.
     
  4. Mar 2, 2005 #3
    My dear friend!

    The height u r required to determine!
     
  5. Mar 2, 2005 #4

    dextercioby

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    Well,that wasn't the question...:tongue: Did u computethe new "g"...?

    Daniel.
     
  6. Mar 2, 2005 #5
    Solution:
    At z=0 (sea level); g=a
    Say at height x the accelarion due to gravity is 99% i.e 0.99a. This is the height where the weight will be 99% too (F=mg).
    So 0.99a=a - bx.

    x = 0.01a/b.
     
  7. Mar 2, 2005 #6

    dextercioby

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    It would have been much better,if the OP would have found the sollution...

    Daniel.
     
  8. Mar 3, 2005 #7
    Thanks a lot Snbose! You have helped me a lot

    Thank u very much
     
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