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Escape Speed

The escape ve...

Question

The escape velocity of a body from the surface of the earth is $11.2 k m / s$ . If a satellite were to orbit close to the surface, what would be its critical velocity?

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Solution

$v_{e} = \sqrt{2} v_{c}$
$\Rightarrow v_{c} = \frac{11.2}{\sqrt{2}} = 7.91 k m / s$

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