RAJASTHAN ­ PET Rajasthan PET Solved Paper-2005

  • question_answer
    The mass and radius of a planet have half the value of corresponding parameter of earth. Acceleration due to gravity on the surface the planet is

    A)  \[4.9\text{ }m/{{s}^{2}}\]           

    B)  \[9.8\text{ }m/{{s}^{2}}\]

    C)  \[19.6\text{ }m/{{s}^{2}}\]         

    D)  zero

    Correct Answer: C

    Solution :

     \[{{g}_{stalite}}=\frac{G(M/2)}{{{(R/2)}^{2}}}\] \[=\frac{2GM}{{{R}^{2}}}=2\times 9.8\] \[=19.6\text{ }m/{{s}^{2}}\]


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