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

  • question_answer
    A research satellite of mass 200 kg circles the earth in an orbit of average radius 3R/2 where R is the radius of the earth. Assuming the gravitational pull on a mass of 1 kg on the earth?s surface to be 10 N, the pull on the satellite will be  [Kerala (Engg.) 2002]

    A) 880 N

    B)             889 N

    C)             890 N 

    D)             892 N

    Correct Answer: A

    Solution :

                    \[g'=g\,{{\left( \frac{R}{R+h} \right)}^{2}}=g\,{{\left( \frac{R}{3R/2} \right)}^{2}}=\frac{4}{9}g\] \ \[W'=\frac{4}{9}\times mg=\frac{4\times 200\times 9.8}{9}=880\ N\]


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