Pendulum and altitude

  • #1
How can I measure altitude depending on the period of a pendulum? I know I have to calculate the value for g but I don't know how exactly altitude could be calculated.
 

Answers and Replies

  • #2
dextercioby
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Within "human limits",'g' is very weakly dependent upon altitude,but certainly,in principle,one can measure its values using a pendulum...

[tex] T=2\pi \sqrt{\frac{l}{g}} [/tex]

[tex]g=\frac{GM_{E}}{(\bar{R}_{E}+h)^{2}} [/tex]

Daniel.
 
  • #3
Sorry, but can you explain what the second formula means?
 
  • #4
dextercioby
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That is the acceleration of a body at height "h" about the surface of the Earth,due to Earths gravity...I'm sure it's not the first time u saw it...

Daniel.
 
  • #5
what is [tex]\bar{R}_{E}[/tex] ?
 
  • #6
dextercioby
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The Average Radius of the Earth...??You know the one which you can compute,if you know the polar & equatorial radius and a bit of geometry.

Daniel.
 

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