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The speed of a satellite that revolves a...

The speed of a satellite that revolves around earth at a height `3R` from earth's surface is (`g=10 m//s^(2)` at the surface of earth, radius of earth `R=6400 km`) in `kms^(-1)`

A

`2sqrt(2)`

B

`4`

C

`4sqrt(2)`

D

`8`

Text Solution

Verified by Experts

The correct Answer is:
B
`g` at a height `4R=g/16` and `v_(0)=sqrt(g(4R))tosqrt(g/16(4R))`
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