NEET Sample Paper NEET Sample Test Paper-19

  • question_answer 36) Two particles A and B initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is V and the speed of B is 2F, the speed of the center of mass of the system is

    A)  3V                              

    B)  V

    C)  1.5 V              

    D)  0

    Correct Answer: D

    Solution :

    As there is no external force involved, so in conformance with the law, \[{{F}_{ext}}=M{{a}_{cm}},\]the acceleration of the center of mass is zero. Initially the center of mass is at rest, so it will continue to remain at rest. Hence, the correction option is [d].

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