Question

Problem 1.05. Assuming the earth to be a sphere of uniform
mass density, how much would a body weigh 800 km
below the surface of the earth, if it weighed 360 N on the
surface ? Given that radius of the earth, R = 6,400 km.​

Answer 1

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:

300N

Bhai 1 Vala answer wrong haaa

Ya Vala ha answer dak lo na to exam ma galat hoo jayaga hahaha