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NEET Sample Paper NEET Sample Test Paper-18

  • question_answer
    A particle of mass m moving towards the east with speed \[\upsilon \]collides with another particle of same mass and same speed\[\upsilon \]moving towards north. If two particles stick to each other, the new particle of mass 2 m will have a speed of

    A) \[\upsilon \]                             

    B) \[\frac{\upsilon }{2}\]

    C) \[\frac{\upsilon }{\sqrt{2}}\]                          

    D) \[\frac{\upsilon }{\sqrt{2}}\] 

    Correct Answer: C

    Solution :

    Applying principle of conservation of linear momentum. \[(2m)\upsilon =\sqrt{{{(m\upsilon )}^{2}}+{{(m\upsilon )}^{2}}}=m\upsilon \sqrt{2}\] \[\upsilon =\frac{\upsilon \sqrt{2}}{2}=\frac{\upsilon }{\sqrt{2}}\] Hence, the correction option is [c].


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