a person move 4m along East 7m in west and then 5m north east what iis the displacmnt form initial and final point?
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Displacement between initial and final position = 4m
Since, after moving west the person is 3m west of its origin and then the person turns north-east and moves 5m, the person ends up 4m north of its origin.
We get 4m by Pythagoras theorem, i.e
base² + perpendicular² = hypotenuse²
=> 3² + perpendicular² = 5²
=> 9 + perpendicular² = 25
=> perpendicular² = 25 - 9
=> perpendicular² = 16
=> perpendicular = √16 = 4m = Displacement
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