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

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

e

d

)g

g

′

=(1−

2R

e

R

e

)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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