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NEET Sample Paper NEET Sample Test Paper-73

  • 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 1/7 and radius is half that of the earth?

    A) 200 gm wt                    

    B) 400gmwt

    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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