NEET Sample Paper NEET Sample Test Paper-77

  • question_answer
    An artificial satellite moving in a circular orbit around the earth has a total \[\left( kinetic + potential \right)\] energy potential energy is                                                                                     

    A)  \[-\,{{E}_{0}}\]                       

    B)  \[1.5\,\,{{E}_{0}}\]

    C)  \[2\,\,{{E}_{0}}\]                    

    D)  \[{{E}_{0}}\]

    Correct Answer: C

    Solution :

    For a satellite, we have \[\operatorname{Kinetic} energy =\,\,\frac{GmM}{2r}\] \[\operatorname{Potential} energy =\,\,-\frac{GmM}{r}\] Total energy \[{{E}_{0}}= KE + PE\] \[=\,\,\,\frac{GmM}{2r}-\frac{GmM}{r}=-\frac{GmM}{2r}=\frac{PE}{2}\] or        \[\operatorname{PE}=2{{E}_{0}}\]


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