A boy travels 10m due north and then 7m due east.Find the displacement of the boy.
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Displacement of the boy is in the form of a right angled triangle with base 7m and altitude 10m. hence the displacement is the hypotenuses.
Therefore √(100+49)=√149.
the boy is now facing in the south west direction to face his original starting point.
therefore his displacement is √149 in the northeast direction.
Therefore √(100+49)=√149.
the boy is now facing in the south west direction to face his original starting point.
therefore his displacement is √149 in the northeast direction.
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Answer:
12.20 using Pythagoras' theorem
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