The escape velocity of a particle of a particle from the surface of the earth is given by

Options

A. `(gR)^(1//2)`
B. `(2gR)^(1//2)`
C. `(3gR)^(1//2)`
D. `(gR//2)^(1//2)`

Answer

B

Explanation

Escape velocity `v_(e)=sqrt(2gR)`