AIPMT PRELIMS2011Physics-Gravitation
AIPMT PRELIMS 2011 Physics Kepler's Laws MCQ Question
Type: MCQ-conceptual-Medium-Class 11
A planet is moving around the sun in an elliptical orbit. Its closest to the sun at a distance r₁ and farthest away at a distance of r₂. If v₁ and v₂ are the linear velocities at these points respectively. Then the ratio v₁/v₂ is
A
r₁/r₂
B
(r₁/r₂)²
C
r₂/r₁
D
(r₂/r₁)²
Correct Answer
Option C
Detailed Explanation
v₁r₁ = v₂r₂ (∵ angular momentum is constant)
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