What is Escape velocity

What is Escape Velocity?

Full Answer / Notes:

Definition:

Escape velocity is the minimum speed required for an object (like a rocket) to escape the gravitational pull of a planet and not fall back.

Value for Earth:

The escape velocity of Earth is approximately 11.2 km/s (kilometers per second)

How it works:

The Earth pulls objects downward due to gravity

If a rockets speed is low it falls back

If the rockets speed is equal to or greater than escape velocity it goes into space and does not return

Concept:

This is based on the concept of Gravitational Force

Important Points:

Escape velocity does not depend on the mass of the object

It depends on the gravity of the planet

On the Moon, escape velocity is lower (about 2.4 km/s)

Example:

When ISRO launches rockets, they must reach escape velocity to leave Earths gravity.

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