A planet revolves in elliptical orbit around the Sun. The linear speed of the planet will be maximum at

Question

A planet revolves in elliptical orbit around the Sun. The linear speed of the planet will be maximum at <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/p-vpzwvv9az1hh.png" /> (A) A (B) B (C) C (D) D

Tardigrade Admin · Accepted Answer

Here, angular momentum is conserved, i.e. L=Iω constant. At A , the moment of inertia I is least. So angular speed and therefore the linear speed of planet at A is maximum.

Q. A planet revolves in elliptical orbit around the Sun. The linear speed of the planet will be maximum at

$A$

$B$

$C$

$D$

Here, angular momentum is conserved,
i.e. $L = I ω$ constant.
At $A$ , the moment of inertia $I$ is least. So angular speed and therefore the linear speed of planet at $A$ is maximum.