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The minimum s...

Question

The minimum speed of a particle projected from earths surface so that it will never return is/are:

A

(GM/R)

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B

22.1 km/sec

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C

(4 g_{o} R)

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D

none of above

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Solution

The correct option is D none of above
The minimum speed of a particle projected from earth's surface so, that it will never return is escaped velocity $= \sqrt{\frac{2 G M}{R}}$

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