Question

assuming the earth to be spared of uniform mass density how much would a body weight half with down to the centre of the Earth if it better to 15 Newton on the surface

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Answer 1

Answer:

Weight of a body of mass m at the Earth's surface,W=mg=250 N

Body of mass m is located at depth, d=Re/2

Acceleration due to gravity at depth g(d) is given by the relation: 

g′=(1−Red)g

g′=(1−2ReRe)g

     =g/2

Weight of the body at depth d, 

W′=mg′

       =mg/2=W/2

       =125 N

Answer 2

Answer:

Mention not dear

Explanation:

Weight of a body of mass m at the Earth's surface,W=mg=250 N

Body of mass m is located at depth, d=R e /2

Acceleration due to gravity at depth g(d) is given by the relation: g ′

=(1− R ed )gg ′

=(1− 2R eRe )g

=g/2

Weight of the body at depth d, W ′

=mg

=mg/2=W/2

=125 N