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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 3 V, then the speed of satellite B will be
Options
(a) 3 V / 4
(b) 6 V
(c) 12 V
(d) 3 V / 2
Correct Answer:
6 V
Explanation:
Orbital velocity of a satellite in a circular orbit of radius a is given by
v = √(GM / a) ⇒ v α √(1/a) ⇒ v₂ / v₁ = √(a₁ / a₂)
v₂ = v₁ √(4R / R) = 2 v₁ = 6 V
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A black body is at 727⁰C. It emits energy at a rate which is proportional to
- If light emitted from sodium bulb is passed through sodium vapour,
- A proton is projected with a speed of 3×10⁶ m/s horizontally from east to west.
- Three objects coloured black, gray and white can withstand hostile conditions upto 2800⁰C.
- The term liquid crystal refers to a state that is intermediate between
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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