A research satellite of mass `200 kg` circles the earth in an orbit of average radius `3 R//2`, where `R` is the radius of the earth. Assuming the gravitational pull on the mass of `1 kg` on the earth's surface to be `10 N`, the pull (in Newton) on the satellite will be

Options

A. 880 N
B. 889 N
C. 890 N
D. 892 N

Answer

B

Explanation

`g.=g/((1+h/R)^2)=g/((1+1/2))=4/9g`
`W.=4/9xxmg=4/9xx200xx10=889N`