# science

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A boy moves 100m towards North then 70 my towards East then what is its displacement

• science -

Is there a formula for displacement?

• science -

Displacement is position vector
in this case it is

70 i + 100 j in x y coordinates where i is unit x and j is unit y vectors

its magnitude is sqrt (70^2 + 100^2)
it direction north of east is
tan theta = 100/70
the compass angle east of north is 90 -theta

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