Easy MCQ +4 / -1 PYQ · JEE Mains 2023

Choose the incorrect statement from the following:

  1. A The linear speed of a planet revolving around the sun remains constant. Correct answer
  2. B When a body falls towards earth, the displacement of earth towards the body is negligible.
  3. C The speed of satellite in a given circular orbit remains constant.
  4. D For a planet revolving around the sun in an elliptical orbit, the total energy of the planet remains constant.

Solution

The linear speed of a planet revolving around the sun does not remain constant, as planets follow an elliptical orbit around the sun. According to Kepler's second law, the areal velocity of a planet remains constant, which means that the planet moves faster when it is closer to the sun (at perihelion) and slower when it is farther away (at aphelion).

About this question

Subject: Physics · Chapter: Gravitation · Topic: Newton's Law of Gravitation

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