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Unit vector along the vector 4î + 3ĵ is _____(a) (4î + 3ĵ)/5(b) 4î + 3ĵ(c) (4î + 3ĵ)/6(d) (4î + 3ĵ)/10I had been asked this question during a job interview.This is a very interesting question from Vector Addition topic in portion Motion in a Plane of Physics – Class 11

Answer» RIGHT option is (a) (4î + 3ĵ)/5

For explanation: Unit vector along 4î + 3ĵ , is obtained by dividing the PRESENT vector by its magnitude. The magnitude of the given vector is 5. HENCE, the required unit vector is (4î + 3ĵ)/5.


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