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

  • question_answer
    A force of 12 N gives an object an acceleration of\[\text{4 m}/{{\text{s}}^{\text{2}}}\]. The force required to give it an acceleration of \[\text{1}0\text{ m}/{{\text{s}}^{\text{2}}}\]is

    A)  15 N                     

    B)         20 N

    C)  25 N                     

    D)         30 N  

    Correct Answer: D

    Solution :

     Mass is same, therefore \[\frac{F}{a}\] is same. \[\therefore \]      \[\frac{{{F}_{2}}}{12}=\frac{10}{4}\] or         \[{{F}_{2}}=30\]


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