Gravitation Question 296

Question: A planet revolves about the sun in elliptical orbit. The areal velocity [(dAdt)] of the planet is[4.0×1016m/s] . The least distance between planet and the sun is[2×1012m] . Then the maximum speed of the planet in km/s is

Options:

A) 10

B) 20

C) 30

D) 40

Show Answer

Answer:

Correct Answer: D

Solution:

  • [L2m=dAdt] (L= angular momentum) [mvmaxrmin2m=dAdt;vmax=2dA/dtrmin=40]


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