The escape velocity of a body from the surface of earth is

Options

A. `sqrt2`
B. `1/sqrt2`
C. 1
D. 6

Answer

B

Explanation

According to question and by using COME`-(GMm)/(R+R)+(1)/(2)m(fv)^(2)=0+0`
`impliesfvsqrt((GM)/(R)) but v=sqrt((2GM)/(R))`
Therefore `fsqrt((GM)/(R))but v=sqrt((2GM)/(R))impliesf=(1)/sqrt2`