# science

A ship sailed 15 km north, then 20km east followed by 10km south. Find its displacement from its starting point

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1. The first and last legs of the journey are equivalent to a displacement of 5 km north.

Add, as vectors, the net displacement vectors of 5 km north and 20 km east. Use the Pythagorean theorem.

sqrt(5^2 + 20^2) = sqrt(425) = ___ km

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2. with the sqare root of 425,the answer will be 20.6km

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