Statement I: The speed of revolution of an artificial satellite revolving very near the earth is 8 ${kms}^{- 1}$ .
Statement II: Orbital velocity of a satellite, become independent of height of near satellite.

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If both statement I and statement II are true and statement II is the correct explanation of statement I.

If both statement I and statement II are true but statement II is not the correct explanation of statement I.

If statement I is true but statement II is false

If both statement I and statement II are false

answer is A.

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Detailed Solution

$v_{o} = R_{e} \sqrt{\frac{g}{R_{e} + h}}$

For satellite revolving very near to earth $Re + h = R_{e}$

As (h<<R)

$v_{o} = \sqrt{R_{e} g} = \sqrt{64 \times 10^{5} \times 10} = 8 \times 10^{3} m / s = 8 {kms}^{- 1}$

Which is independent of height of a satellite.

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