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JEE Main & Advanced Physics Gravitation / गुरुत्वाकर्षण Question Bank Mock Test - Gravitation and Mechanical Properties of Solid

  • question_answer
    The earth moves around the Sun in an elliptical orbit as shown Earth in the figure. The ratio\[OA/OB=x\]. The ratio of the speed of the earth at B to that at A is nearly

    A) \[\sqrt{x}\]                   

    B) \[x\]

    C) \[x\sqrt{x}\]     

    D) \[{{x}^{2}}\]

    Correct Answer: B

    Solution :

    [b] Applying conservation of angular momentum at position A . and B \[m{{v}_{A}}\times OA=m{{v}_{B}}\times OB\] Hence, \[\frac{{{v}_{B}}}{{{v}_{A}}}=\frac{OA}{OB}=x\]


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