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

  • question_answer
    A car travels with a speed of \[50\,km\,{{h}^{-1}}\]in the 1st hour and \[100\,km\,{{h}^{-1}}\] in the 2nd hour. What is the total distance covered by the car in the two hours?

    A)  50km                                   

    B)  100km 

    C)         150 km                

    D)         200 km                

    Correct Answer: C

    Solution :

    Since, the units of time and speed are the same, the distances have to be added up in the following manner. Distance = speed \[\times \] time Distance travelled in the 1st hour Distance = 50 \[\times \] 1 = 50 km Distance travelled in the 2nd hour Distance = 100 x 1 = 100 km Total distance 50 km + 100 km = 150 km


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