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NEET Sample Paper NEET Sample Test Paper-40

  • question_answer
    Two stones of masses m and 1m are whirled in horizontal circles, the heavier one in a radius \[\frac{r}{2}\] and the lighter one in radius r. The tangential speed of lighter stone is n times that of the value of heavier stone when they experience same centripetal forces. The value of n is:

    A)  1

    B)  2

    C)  3

    D)  4

    Correct Answer: B

    Solution :

     \[{{({{F}_{C}})}_{heavier}}={{({{F}_{C}})}_{lighter}}\] \[\Rightarrow \]   \[\frac{2m{{V}^{2}}}{(r/2)}=\frac{m{{(nV)}^{2}}}{r}\Rightarrow {{n}^{2}}=4\Rightarrow n=2\]


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