An object weighs 20 N at the north pole of the earth. In a satellite, revolving at an altitude 4 times the radius of the earth its true weight and apparent weight are

Options

A. 0, 0.8 N
B. 5 N, 0
C. 1.25 N, 0
D. 0.8 N, 0

Answer

d

Explanation

`(W_(2))/(W_(1))=((R)/(R+h))^(2)=((R)/(R+4R))^(2)=((1)/(5))^(2)=(1)/(25)`
`W_(2)=(W_(1))/(25)=(20)/(25)=0.8N`
Apparent weight is zero.`