JEE Main & Advanced Physics Gravitation / गुरुत्वाकर्षण Question Bank Acceleration Due to Gravity

  • question_answer
    Assuming earth to be a sphere of a uniform density, what is the value of gravitational acceleration in a mine 100 km below the earth?s surface (Given R = 6400 km) [AFMC 2000; Pb. PMT 2000]

    A)             \[9.66\,m/{{s}^{2}}\]

    B)               \[7.64\,m/{{s}^{2}}\]

    C)             \[5.06m/{{s}^{2}}\]

    D)               \[3.10\,m/{{s}^{2}}\]

    Correct Answer: A

    Solution :

                    \[g'=g\,\left( 1-\frac{d}{R} \right)=9.8\,\left( 1-\frac{100}{6400} \right)=9.66\,m/{{s}^{2}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner