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NEET Sample Paper NEET Sample Test Paper-44

  • question_answer
    There are two holes\[{{\operatorname{O}}_{1}} and {{O}_{2}}\]in a tank of height H. The water emerging from \[{{\operatorname{O}}_{1}} and {{O}_{2}}\] strikes the ground at the same points, as shown in figure. Then:

    A) \[\operatorname{H}={{h}_{1}}+{{h}_{2}}\]                

    B) \[\operatorname{H}={{h}_{1}}-{{h}_{2}}\]

    C) \[\operatorname{H}=\sqrt{{{h}_{1}}{{h}_{2}}}\]         

    D) None

    Correct Answer: A

    Solution :

    Mass of car = 100kg Radius of track = 20m Friction force provides the necessary centripetal force \[{{\operatorname{f}}_{r}}={{f}_{c}}\] \[\mu mg~=\frac{{{\operatorname{mv}}^{2}}}{\operatorname{r}}\] \[\operatorname{v}=\sqrt{\mu \operatorname{r}\operatorname{g}}\] \[\operatorname{v}=\sqrt{0.64\times 20\times 10}=11.28m/s\]


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