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  3. 7th Class
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  5. Time and Motion

7th Class Science Time and Motion Question Bank Motion and Time

  • question_answer
    Which car, moving from rest, has an average acceleration of \[2.0\text{ }m\text{ }{{s}^{-2}}\]?               

    A) A car reaching a speed of \[10\text{ }m\text{ }{{s}^{-1}}\]in 2 s.                           

    B) A car reaching a speed of \[20\text{ }m\text{ }{{s}^{-1}}\] in 5 s.                            

    C) A car reaching a speed of \[30\text{ }m\text{ }{{s}^{-1}}\]in 10 s.                          

    D) A car reaching a speed of \[40\text{ }m\text{ }{{s}^{-1}}\] in 20 s.                          

    Correct Answer: D

    Solution :

    Average acceleration \[=\frac{Final\text{ }velocity-Initial\text{ }velocity}{Change\text{ }in\text{ }time}\]


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