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

  • question_answer
    A body weighs 700 gm wt on the surface of the earth. How much will it weigh on the surface of a planet whose mass is \[\frac{1}{7}\] and radius is half that of the earth [CMC Vellore 1984; AFMC 2000]

    A) 200 gm wt

    B)               400 gm wt

    C)             50 gm wt        

    D)             300 gm wt

    Correct Answer: B

    Solution :

                    We know that \[g=\frac{GM}{{{R}^{2}}}\] On the planet \[{{g}_{p}}=\frac{GM/7}{{{R}^{2}}/4}=\frac{4g}{7}=\frac{4}{7}g\] Hence weight on the planet \[=700\times \frac{4}{7}=400\,\,gm\,wt\]


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