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Manipal MET2013PhysicsGravitation

A body weights 500 N on the surface of the earth. How much would it weigl half way below the surface of the earth?

Options

  1. A1000 N
  2. B500 N
  3. C250 N
  4. D125 N

Correct answer

C. 250 N

Step-by-step solution

Value of acceleration due to gravity decreases on going below the surface of the earth. weight (w) of a body is defined as product of mass ( m ) and acceleration due to gravity ( g ) w=m g The value of g below the surface of earth at a distance h is given by g^ =g (1- h R ) W^ =W (1- h R ) Given, h= R 2 , W=500 ~N W^ =500 (1- 1 2 )= 500 2 =250 ~N

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