Question

What is escape velocity? Obtain an expression for escape velocity on earth?  

(b) Why is it that there is no atmosphere on moon?  ​

Answer 1

From this equation, it can be said that the escape velocity depends on the radius of the planet and the mass of the planet only and not on the mass of the body. Escape Velocity of Earth= 11.2 km/s. This was the derivation of the escape velocity of earth or any other planet.

Answer 2

Answer:

Escape velocity: -The minimum speed with which a body must be projected. in order that it will escape from the earth gravitational filed is called as. escape velocity. Expression of it:-consider a body of mass m on the surface of earth. whose mass and radius are respectively represented by M and R.

b.Our Moon doesn't have an atmosphere because it is too small and doesn't have a strong magnetic field. Any atmosphere it might have had would be stripped away by the solar wind that barrages the small world. In contrast, our planet has more mass to hold its atmosphere close, and a strong magnetic field to protect it.

Explanation:

hope it helps