9th Class Science Gravitation and Floatation Question Bank Gravitation and Pressure

  • question_answer
    Which of the following statements is NOT correct about a planet rotating around the sun in an elliptical orbit?

    A)  Its kinetic energy is constant.  

    B)  Its angular momentum is constant.

    C)  Its areal velocity is constant.

    D)  Its time period is proportional to r3.

    Correct Answer: A

    Solution :

     A planet rotating around the sun in an elliptical orbit has varying kinetic energy due to the non-uniform speed of the planet. Options [b], [c] and [d] are correct.


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