NEET Sample Paper NEET Sample Test Paper-29

  • question_answer Two particles separated at a horizontal distance X as shown in fig. they projected at the same line as shown in fig. with different initial speeds. The time after which the Horizontal distance between them become zero

    A)  \[\frac{x}{u}\]                               

    B)  \[\frac{u}{2x}\]

    C)  \[\frac{2u}{x}\]                                               

    D)  None of these

    Correct Answer: A

    Solution :

    \[Time=\frac{Relative\text{ }horizontal\text{ }dis\text{ }tan\text{ }ce}{Relative\text{ }horizontal\text{ }velocity}\] \[=\frac{x}{u\,\cos \,{{60}^{o}}}+\frac{u}{\sqrt{3}}\,\cos \,{{30}^{o}}=\frac{x}{u}\]          

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