SOLAR SYSTEM

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UNIVERSE

SATELLITESICY BODIES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The minimum velocity required to leave the atmosphere is called the ____
A
orbital velocity
B
ejection velocity
C
terminal velocity
D
escape velocity
Explanation: 

Detailed explanation-1: -On earth, the escape velocity is around 40, 270 kmph, which is around 11, 186 m/s. For example, when a spacecraft is launched into outer space, the velocity attained by this should be greater than the escape velocity so that the rocket doesn’t fall back onto earth.

Detailed explanation-2: -Escape velocity is the speed that an object needs to be traveling to break free of a planet or moon’s gravity well and leave it without further propulsion.

Detailed explanation-3: -It is also known as the Second Cosmic Velocity. Escape Velocity is independent of the size, mass, shape of the body and also the direction of projection. The escape velocity of earth is 11.2 km/s whereas the same for the moon is 2.4 km/s.

Detailed explanation-4: -The escape velocity of Earth is 11.19 km/s.

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