Question

what do u mean by escape velocity?

Answer 1

In physics, escape velocity is the minimum speed needed for an object to escape from the gravitational influence of a massive body. The escape velocity from Earth is about 11.186 km/s (6.951 mi/s; 40,270 km/h; 25,020 mph) at the surface. i think it helps you

Answer 2

Escape velocity is the speed with which an object overcomes the pull of gravity, and is able to go into orbit around the Earth. It is the speed which gives the mass the kinetic energy needed to counterbalance the potential energy at high altitude. The formula is v= square root of 2GM/R. It is able to stay in orbit because of the fact that the escape velocity is 1.41 times the velocity of the orbit at that radius. However not every altitude will allow an orbit. In order to stay in orbit an object needs to be above about 100 km. of atmosphere, which even though it is very thin at that altitude, it can slow down the object so that it will drop down and burn up in the atmosphere, as has happened to many satellites.

I should add that for our planet the escape velocity is 11.2 km/sec.