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What is the escape velocity of the objec...

What is the escape velocity of the object, if.the magnitude of the potential energy per unit mass of the object at the surface of earth is `E`?

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Magnitude of the potential energ per unit mass of the object at the surface of earth is
`(GM)/R=E` (given)
Escape velocity `v=sqrt((2GM)/R)=sqrt(2E)`
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