Question

Define escape velocity and it's value​

Answer 1

Answer:

the lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.

Explanation:

On the surface of the Earth, the escape velocity is about 11.2 km/s, which is approximately 33 times the speed of sound (Mach 33) and several times the muzzle velocity of a rifle bullet (up to 1.7 km/s). However, at 9,000 km altitude in "space", it is slightly less than 7.1 km/s.

Answer 2

Answer:

• Escape velocity refers to the minimum velocity which is needed to leave a planet or moon.
• The formula for escape velocity comprises of a constant, G, which we refer to as the universal gravitational constant.
• The value of it is = 6.673 × 10-11 N . m2 / kg2.
• The unit for escape velocity is meters per second (m/s).