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  5. Time and Motion

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

  • question_answer
    An athlete runs 100 m in 10 s, then turns back and runs 50 m back towards the starting point in 30 s. What is the average speed of the athlete?

    Answer:

    \[Average\,\,speed=\frac{total\,\,dis\tan ce}{total\,\,time\,taken}=\frac{100m+50m}{10s+30s}\] \[=\frac{150}{40s}=3.75\,m{{s}^{-1}}\]


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