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JEE Main & Advanced Physics Gravitation / गुरुत्वाकर्षण Question Bank Self Evaluation Test - Gravitation

  • question_answer
    The value of 'g' at a particular point is\[9.8 m/{{s}^{2}}\]. Suppose the earth suddenly shrinks uniformly to half its present size without losing any mass. The value of 'g? at the same point (assuming that the distance of the point from the centre of the earth does not shrink) will now be

    A) \[4.9\,\,m/se{{c}^{2}}\]

    B) \[3.1\,\,m/se{{c}^{2}}\]

    C) \[9.8\,\,m/se{{c}^{2}}\]

    D) \[19.6\,\,m/se{{c}^{2}}\]

    Correct Answer: C

    Solution :

    [c]  \[g=\frac{GM}{{{r}^{2}}}\]Since M and r are constant, so\[\operatorname{g}=9.8m/{{s}^{2}}\]


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