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  4. 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 />

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

Question

NTA AbhyasNTA Abhyas 2020Gravitation

Solution:

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