Derive the expression for escape velocity for a body projected from the surface of the earth. Calculate escape velocity on the surface of the earth if the radius of the earth is 6400 Km and acceleration due to gravity is 9.8 m/s² on the surface of the earth. A body is projected out thrice the escape velocity. What will be the velocity of the body far away from the earth? Ignore the presence of the sun and other planets.

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TextEscape Speed from Earth

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