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

  • question_answer
    The speed of earth's rotation about its axis is cd. Its speed is increases to x times to make the effective acceleration due to gravity equal to zero at the equator. Then x is:

    A) 1

    B) 8.5   

    C) 17

    D) 34

    Correct Answer: C

    Solution :

    [c] \[g'=g-{{\omega }^{2}}R,\]for g? to be zero, \[\omega '=\sqrt{g/R}\simeq 17\omega \]


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