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12 October, 17:29

A runner traveled 15 kilometers north then backtracked 11 kilometers south before stopping. His resultant displacement was:

26 km south

4 kilometers south

4 kilometers north

26 km north

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Answers (1)
  1. 12 October, 19:59
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    Answer

    4 kilometers north

    Explanation

    The displacement of is vector quantity. It has both magnitude and direction.

    Taking the displacement towards north to be positive, the displacement towards south would be negative.

    ∴ Total displacement = 15 + (-11)

    = 15 - 11

    = 4 Km
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