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NEET Sample Paper NEET Sample Test Paper-55

  • question_answer
    A stone is projected vertically upto reach maximum height h. The ratio of its KE to its potential energy at a height (4/5) h. will be:

    A) 5 : 4                 

    B) 4 : 5

    C) 1 : 4                             

    D) 4 : 1           

    Correct Answer: C

    Solution :

    \[E=mg\times \frac{4h}{5}\] \[P.E\,\,=\,\,mgh\] \[K.E=mgh-m{{g}^{2}}h/5=mgh/5\] \[=\,\,\frac{\frac{1}{5}mgh\times 5}{4h\,\times \,mg}\,\,=\,\,\frac{1}{4}\]


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