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

  • question_answer
    One Newton is defined as the force which gives a mass of 1 kg and acceleration of............ .

    A) 1km/h            

    B) \[1m/{{s}^{2}}\]

    C) \[1Km/{{h}^{2}}\]           

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

    Correct Answer: D

    Solution :

    [d] If, m=1 kg, F=1 N, then F =ma
    \[\Rightarrow \]1 N =1 kg \[\times \]a
     \[\Rightarrow \] \[a\ =\frac{1N}{1\operatorname{kg}}=\frac{1\operatorname{kg}-m{{s}^{-2}}}{1\ \operatorname{kg}}=1{{\operatorname{ms}}^{-2}}\]


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