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An unmanned s...

Question

An unmanned space probe is to be thrown with such a velocity that it does not return back to Earth. It should be thrown with:

A

velocity > (2GM)^1/2/ R necessarily

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B

a great velocity but nothing more can be said

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C

velocity = (2GM)^1/2/R

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D

velocity ≥ (2GM/R)^1/2

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Solution

The correct option is D
velocity ≥ (2GM/R)^1/2

An unmanned space probe should be thrown with velocity ≥ (2GM/R)^1/2so that it does not return back to earth.

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