A jogger runs 6 km north, 5 km east, then another 4 km north. Her average speed 8 km/h. How long will it take her to complete her run?10.

Question

A jogger runs 6 km north, 5 km east, then another 4 km north. Her average speed 8 km/h. How long will it take her to complete her run?10.
Using the information from the previous question, what is her average velocity during this time?

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Thành Đạt 3 years 2021-07-18T17:47:03+00:00 1 Answers 463 views 0

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  1. Eirian
    0
    2021-07-18T17:48:45+00:00
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    Answer:

    The time taken to complete her run is 1.9 hr.

    Explanation:

    Speed is a scalar quantity and it is defined as the ratio of distance covered to the time taken to cover that distance. As distance is also a scalar quantity, so the directions given in the problem can be ignored. Thus, the distance covered by the jogger is the sum of kilometers given in problem.

    Distance covered = 6+5+4 = 15 km

    And the speed is given as 8 km/hr.

    So the time taken will be ratio of distance to speed.

    So the jogger will take 1.9 hr to complete her run.

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