# physics

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a body displaced 12m due to east then 5m due to north then 9m vertically upward what is the resultant displacement?

• physics -

sqrt (12^2 + 5^2) = sqrt(144+25) = 13
sqrt (13^2 + 9^2) = (sqrt(169+81) = sqrt(250) = 5 sqrt(10)

• physics -

or: sqrt(12^2 + 5^2 + 9^2) = sqrt 250
since all three displacements are mutually perpendicular

• physics -

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