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  3. 9th Class
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  5. Time and Motion

9th Class Science Time and Motion Question Bank Motion Formative Subjective Problems

  • question_answer
    Refer figure. Find the ratio of speed in first two seconds to the speed in the next four seconds.

    Answer:

    Speed in first two seconds, \[v=\frac{s}{s}.\] Speed in time interval 2 to 6 seconds is \[V'=\frac{s}{6-2}=\frac{s}{4}.\,\,\therefore \frac{V}{V'}=\frac{s/2}{s/4}=2:1\]


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