A body weighs 200 N on the surface of the earth  how much will it weigh at half way down to the center of the earth ? 

 

  • Option 1)

    150 N 

  • Option 2)

    200 N 

  • Option 3)

    250 N 

  • Option 4)

    100 N 

 

Answers (1)

W_s = 200 N = Mg _ s \\\\ mg _ p \\\\ g_ p = g_ s ( 1- h/R ) \: \: h = R/2 \\\\ g _ p = g _ s ( 1-1/2 ) \\\\ g _p = g _ s /2 \\\\ \frac{W_s }{W_p }= g _ s / g _ p = 2 \\\\W_p = W_ s /2 = 200 /2 = 100 N


Option 1)

150 N 

Option 2)

200 N 

Option 3)

250 N 

Option 4)

100 N 

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