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Relative Velocity in 2D

if ve is esca...

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if ve is escape velocity for earth when projectile is fired from surface of earth ,then escape velocity if same projectile is fired from earths centre

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v_{e}

is the escape velocity for earth when a projectile is fired from the surface of earth. Then the escape velocity if the same projectile is fired from its centre is

Q. A projectile is fired from the surface of earth of radius

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