Answer to Question #134276 in Classical Mechanics for sachin

Question

what is escape velocity.explain briefly.

Answer 1

escape velocity is the minimum velocity needed by anybody or object to be projected to overcome the gravitational pull of the planet earth. In other words, the minimum velocity that one requires to escape the gravitational field is escape velocity.

escape velocity for any large object is calculated from the following equation:

ve = √(2GM/r)

where r =radius of the body

M =mass of the body

G =Newton's gravitational constant

The M in the equation represents the mass of the body . bodies with more mass are harder to escape than bodies with less mass. This is because the more mass a body has, the stronger its force of gravity.