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A planet moving along an elliptical orbit is closest to the sun at a distance of r₁. If v₁ and v₂ are the linear velocities at these points respectively then the ratio v₁ / v₂ is
Options
(a) ( r₁ / r₂)²
(b) r₂ / r₁
(c) (r₂ / r₁)²
(d) r₁ / r₂
Correct Answer:
r₂ / r₁
Explanation:
Angular momentum is conserved
L₁ = L₂ ⇒ mr₁v₁ = mr₂v₂ ⇒ r₁v₁ = r₂v₂
⇒ v₁ / v₂ = r₂ / r₁
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A 220 volts input is supplied to a transformer. The output circuit draws
- Sound waves travel at 350m/s through a warm air and at 3500 m/s through brass
- The unit of permitivity of free space, ε₀ is
- The resistance in the two arms of the meter bridge are 5Ω and RΩ, respectively
- A body rolls down a stair case of 5 steps. Each step has height 0.1 m and width 0.1m
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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