Question

define the escape speed​

Answer 1

Answer:

Escape speed is the minimum speed with which a mass should be projected from the Earth’s surface in order to escape Earth’s gravitation field. Escape speed, also known as escape velocity is defined as:

The minimum speed that is required for an object to free itself from the gravitational force exerted by a massive object.

Answer 2

$\huge{\textbf{\underline{Escape Velocity:-}}}$

The velocity which is required by the body to overcome the feild of attraction of earth gravity is called Escape Velocity.

It is the velocity by which an object is projected it never return back to the earth.

Reason :-

Earth is a huge massive celestial bodies so it attracts every objects towards its centre if any object want to escape from earth surafce it requires escape velocity to overcome earth gravitational effect.

The minimum escape velocity of an object should be :-

$\huge \boxed{{u ≥ \sqrt{\dfrac{2GM}{R}}}}$

• G is universal gravitational constant.
• M is mass of the object.
• R is radius of the object.

When we put the given value.

u will become 11.6 km/s for earth.