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9th Class Science Force and laws of motion Question Bank Force and Laws of Motion

  • question_answer
    The engine of a car produces an acceleration of\[4\,\,m\,\,{{s}^{-2}}\] in a car, if this car pulls another car of same mass, what is the acceleration produced?

    A) \[8\,\,m\,\,{{s}^{-2}}\] 

    B)        \[2\,\,m\,\,{{s}^{-2}}\]  

    C) \[4\,\,m\,\,{{s}^{-2}}\] 

    D)        \[1/2\,\,m\,\,{{s}^{-2}}\]

    Correct Answer: B

    Solution :

    \[F=2m\times {{a}_{1}}\], Given\[F=m\times a=m\times 4\] \[m\times 4=2m\times {{a}_{1}},\,\,{{a}_{1}}=2\,\,m\,\,{{s}^{-2}}\]


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