UPSC Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन Question Bank Force of Gravity, Solids and Fluids

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    Assertion [A]: Gravitational attraction is a central force and therefore in motion of planets in the solar system, the angular momentum is conserved.
    Reason [R]: In the motion of planets of the solar system, equal areas are swept in equal time.

    A) Both A and R are true and R is the correct explanation of A

    B) Both A and R are true but R is not the correct explanation of A

    C) A is true but R is false

    D) A is false but R is true

    Correct Answer: A


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