An object is thrown from the surface of the moon. The escape speed for the object is
Options:
(a) `sqrt(2g'R_m)`, where `g'`=acceleration due to gravity on the moon and `R_m` = radius of the moon
(b) `sqrt(2g' R_e)`, where `g'` = acceleration due to gravity on the moon and `R_e` = radius of the earth
(c) `sqrt(2gR_m)` , where `g` = acceleration due to gravity on the earth and `R_m` = radius of the moon
(d) None of the above