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NEET 2010 (AIPMT, Prelims) · Satellites - Orbital Velocity & Period

Satellites - Orbital Velocity & Period question from NEET 2010 (AIPMT, Prelims)

Q68NEET 2010 · AIPMT · PRELIMSEasy

Satellites - Orbital Velocity & Period

The radii of circular orbits of two satellites A and B of the earth, are 4R and R, respectively. If the speed of satellite A is 3V, then the speed of satellite B will be

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Answer: (b)

Orbital speed $v \propto \frac{1}{\sqrt{r}}$ .
$\frac{v_B}{v_A} = \sqrt{\frac{4R}{R}} = 2$
$v_B = 2 \times 3V = 6V$
So the answer is (b) $6V$ .

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