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JEE Main & Advanced Physics Gravitation / गुरुत्वाकर्षण Question Bank Gravitation Potential

  • question_answer
     If the radius and acceleration due to gravity both are doubled, escape velocity of earth will become [RPMT 2002]

    A)      11.2 km/s

    B)               22.4 km/s

    C)             5.6 km/s

    D)               44.8 km/s

    Correct Answer: B

    Solution :

                    \[v=\sqrt{2gR}\]. If g and R both are doubled then v will becomes two times i.e. 11.2 × 2 = 22.4 km/s


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