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  5. Time and Motion

9th Class Science Time and Motion Question Bank MCQs - Motion

  • question_answer
    A body moving with an initial velocity of 5 m/s accelerates at \[2 m/{{s}^{2}}\]. Its velocity after 10 s is

    A) 20 m/s                                      

    B) 25 m/s

    C) 5 m/s             

    D) 22.5m/s

    Correct Answer: B

    Solution :

    [b] Initial velocity, u = 5 m/s
    Acceleration, a = 2 \[\operatorname{m}/{{s}^{2}}\]
    Time, t = 10 s
    Final velocity, v = ?
    \[v=u+at\Rightarrow v=5+2\times 10=25\operatorname{m}/s\]
     


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