Answers

2015-11-13T22:13:37+05:30
As the given height and depth are very negligible with respect to the radius of the earth therefore 
i) g'=9.8(1-400/6400)
      =9.8x6000/6400
      9.18m/s
ii) g'=g(1-d/R)
       =9.8 x 1-100/6400
       = 9.8 x 6300/6400
       =9.6m/s

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