A person walk first 10 km north and 20 km east, then the resultant vector is.
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Answer:
20i+10j
Explanation:
consider the man to be at the origin initially.
north is along the y-axis and east is along the x-axis.
10km north gives you 10j
and 20km east gives you 20i
their resultant would be 20i+10j
to mind the magnitude
((20)^2+(10)^2)^1/2=(400+100)^1/2
=10(5)^1/2
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