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CBSE Class 12-science Answered

Find a unit vector in the direction of the resultant of the vectors i-j+3k, 2i+j-2k and -i-j-3k.
Asked by akshitaasia | 18 Mar, 2018, 05:35: PM
answered-by-expert Expert Answer

Resultant of the vectors given is

(i-j+3k)+(2i+j-2k)+(-i-j-3k)

Which is equal to r= 2i-j-2k

Magnitude of r=|r|=√(2²+1²+2²)=3

Therefore the unit vectoe in the direction r is

(1/3)×(2i-j+2k)

 

Answered by Sneha shidid | 18 Mar, 2018, 06:05: PM

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