Question

Assuming that the earth to be a sphere of uniform mass density.how much would a body weight half down to the centre of the earth if it's weight is 250N on the earth surface?

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Answer 1

Answer:

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:

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