is 'Escape Velocity' related to the mass of an object or its weight or is it a constant?

Answer 1

Constant man. 11.6 km/s. be it a fly or an elephant.
And Honey, please note the correction. it is km/s and not 11.2 m/s. Even Carl Lewis would be able to escape to space during this jump then!

Answer 2

NO, it does not depends on the mass of the object or its weight. It is constant for every other planet. For earth it is 11.2 m/sec. It is calculated by the formula:-

v = (2gR)^(1/2) i.e. square root of 2gR

where, v = escape velocity
g = acceleration due to gravity of the planet ( here it is of earth i.e. 9.8 m/sec^2 )
R = radius of the planet ( here it is of earth i.e. 64000 Kms )